Agreed, if losing 10lbs gains more footspeed/hops, he should definitely lose the weight.
He's definitely a big wing/4, he played it roughly 70% of the time last season. He only played the 5/BIG when Brad: (1) wanted to go super small, (2) was out of healthy Centers, (3) was giving TL a mental break, (4) was afraid of Kanter's defense or (5) the 5's were in foul trouble. That being said, Grant can guard Bam in a pinch/small minutes or perimeter Centers, so he adds some versatility. BUT offensively he needs to be setting up camp on the perimeter (the corner specifically) and not clogging the lane.
Theis, TimeLord, & Tristan got this at the 5.
Grant's 3pt accuracy:
2020-21: 19/39 (18 games)
2020 playoffs: 10/17 (17 games)
2019/20 reg season: 24/71 (next 49 games)
2019/20 reg season: 0/25 (first 20 games)
There is a trend going on with his 3pt shooting (42% over the last 84 games). It's almost like he was a 20yr rookie at the start of last season and he's figuring out his role/spots to shoot. Commonly known as development/improvement with young players.
Keep giving Grant consistent minutes at the 4, he spreads the floor for the Jays. While he has had some early season defensive miscues, he'll figure them out with tape. Much like Jaylen Brown, he's highly intelligent and comes with a learner's mindset.