I don't see why they'd bring Waters back, now that he can't go on a 2-way. "Pure PG" is a pretty outdated concept and not a reason to keep a guy.
I said it in another thread, but I think we may see Yam Mader in Waters spot. If the C's use the 45th, heavy chance that player is also a 2 way deal.
I know Brown doesn't really replace Fall, but I'd much prefer Mader and Brown to Waters and Fall. After Waters rookie year and play in the G league, I thought there was a small chance he'd have a future in the NBA if he could hit the 3 consistently and cut down on the turnovers. The first isn't out of the question but he's always going to be TO prone. I never considered Fall to have a realistic chance at sticking in the NBA.
The minute I saw Carsen play in an actual (regular season) NBA game I thought he looked completely lost and out of place. That's when the rest of the board was loving him for his preseason performance. I figured he'd wash out of the league. Now I think he has a role in the NBA if put in the right situation. That was not with the Celtics in 20/21. With Kemba gone, it might be the Celtics in 21/22. For all of Edwards warts, he can create his own shot and can score. He offers something off the bench that Langford and PP can't. On the flip side, I'm not sure he can really play with Langford or PP. I don't think he'll ever be able to play with PP (size, defense) but if he or RL becomes acceptable running point, the 2 of them could play together. I think playing PP and RL together causes the same type of problems unless one of them improves in that (playmaking) area.
Ideally, it would be RL. My doubts aside, he has ideal size for a PG, plays defense, and can play alongside the lollipop guild rather than being part of the lollipop guild. Marcus Smart would allow this too but he can't play 48 minutes a game. I could see Marcus and Romeo closing out games together on defense but I think it could be an issue defensively. If Romeo is the back up PG playing 15-20 minutes a night, he's not going to get much overlap with Smart. I think that would be for the best, besides late game D.
Also re: TL, I'm fine with re-signing him if they can get him on a bargain deal due to health. Even then, if you have to plan around him missing 30 games, it makes things a bit more difficult. You need to carry a legit 3rd big. That would cause the team to use a 2 big lineup or to sit one of their bigs. No legit big is going to sign here to be a 3rd stringer who doesn't play. This is why I think Moses Brown has a lot of value with the C's. He may not be the greatest, but he's cheap, he can be stashed in Portland, and is around for 3 more years. In year 1 it may not pay dividends, but in years 2+3 I'd guess having a big who knows the system and has some experience with the players is a better option than having a bunch of 1 and dones, especially since the quality will be along the lines of Wagner and Kornet.. at least until buyout season. When buyout season happens and TL is injured or they just want a better 3rd option, Brown's contract isn't a hinderance either. Back to TL, if he does keep getting injured, eventually those injuries are going to affect his play when he's healthy. I worry about TL and diminished play due to injuries just as much as the actual injuries.
I'm also not sure what TL is actually worth in the modern NBA. Is a 4 year/50 mil deal really a discount for injury? If the C's sign Evan it won't really matter, but if they don't, locking up TL could also effect their ability to get a max guy after 21/22. I'd also wonder if there were better options in FA but that likely won't matter for the C's. I'm just at the point now where I think 95% of bigs aren't worth signing to deals longer than a year or two. Yeah, TL does fit in really well with the Jays but that doesn't mean other bigs won't fit in just as well. The only ones we have to compare him to are Theis, TT and Kanter, and they aren't similar to TL at all. Bring in another long, athletic pogo stick big and see how they fare.
Right now they are at 13 roster spots. Sign Evan, that's 14. Jabari and Brown not guaranteed. Leaves 1 roster spot open. Yam and 45 on 2 way deals. I'm sure more trades are coming though. I think one of TT, TL or even Al is gone before the season starts. I could also see any of AN, RL, GW, PP or Moses being traded away, either as pieces or as matching salary (probably not likely in the case of AN and RL). The more I think about Marcus Smart, the more I think he sticks around. The team needs another PG as is, so trading Smart makes little sense unless it brings back another PG.
definitely here in 21/22
Tatum, Jaylen, Evan, Marcus
Probably here in 21/22
TL, Horford
Here barring a huge trade for a 3rd banana
AN, RL (TL)
Wouldn't hesitate to trade away (doesn't mean they don't offer value) for better fits
TT, PP, Carsen, Grant, Moses, Jabari
I also wouldn't hesitate to trade Horford away, I'm just not sure it's in the cards. In the right deal, I'd move on from anyone besides Tatum. Jaylen would be very hard to pry away but the other guys I'd listen to most offers.
Anyway, long winded post. I think with Mader, Brown, and a free'd up Carsen, the deep end of the bench is already looking a lot better. They replaced 2 players with no real upside with 2 players that have potential. Semi will be gone too, which makes watching Grant less insufferable. Every team needs a Grant or Semi, no team needs both. If the object is to bring in some vets to fill out the bench, player movement is inevitable. Maybe TL graduated, but there's still GW, MB, PP, AN, RL, 45, CE. Way too much youth.