If IT is healthy, Cleveland is a far, far better team.
"Far, far better" than they were last year? I find that unlikely. Kyrie was normal-sized for his position, and had a really nice offensive synergy with LeBron, JR and Love that had developed organically over three years. You're replacing him with a mighty-mite who blossomed in a very specific situation under Stevens, and is now being thrust into a totally different (read: worse) system in which he's no longer the focal point of the offense. You're also taking a team that was already slightly undersized and defensively inept, lopping off six inches of height and adding possibly the biggest defensive liability in the league. Defensively, the Celtics were 9 points per 100 possessions worse last season with IT on the floor, and had a -50 net rating with him on the floor v. the Warriors (tiny sample, but still!)
I also get the sense that hip issues like IT's tend to be chronic and worsen, so even if he's officially "healthy," I think he's unlikely to be quite the same player physically he was last season.
Meanwhile, LeBron, JR Smith, Frye and Green are well on the wrong side of 30; and Korver and Calderon are ancient. They have no rotation players in the age range where you might expect a natural, marginal improvement — the only guy who really fit that bill was Kyrie. As a team, they're oldish, slowish, and smallish, which is a bad combo. (Osman, Felder and Zizic remain lottery tickets till proven otherwise).
As for Rose: he's a losing basketball player, imo. A 6'-3" ballhog who can't shoot or defend is the last thing the Cavs need (or really, any team needs). I consider him pretty much subtraction by addition, especially on a team built around an ultra-ball-dominant player like LeBron who's best when surrounded by lights-out shooters. And that's without even getting to the ego/chemistry/uncertainty issues that are likely to ensue when IT comes off the DL and takes most of Rose's minutes.
On the plus side: Crowder is a fantastic addition for them in terms of his versatility and D, as well as the fact that he allows LeBron to slide more often to PF, which should be his natural position going forward. Only problem with that is that the Cavs' second-best player (Love) happens to play PF, and isn't versatile enough to play any other position. So in crunch time they're stuck with either Love at C which kills them defensively, or Love on the bench, which kills them offensively.
And they have precious little time to work all these things out, with an uncreative coach at the helm, and LeBron's imminent departure casting a pall over everything.
And now [they] have the 18' Nets pick as a trade asset if they want to pick up an extra piece and this team has set itself up to make a serious run at Golden State.
I think they're highly unlikely to move that pick with some assurance from LeBron that he's interested in staying; and I kinda doubt that assurance is forthcoming. But if they are able to move the pick for a player, it better be someone of the caliber of Paul George or Anthony Davis if they want to make a "serious run" at GS, who's significantly longer, faster, younger, deeper, more talented, more cohesive, better coached, and light years better defensively.