I think its a good start but I think the bigger problem is that players do not gain weight in NCAA. In real life a lot of guys will put on 15-20 pounds during their college careers.
And I like your proposed system better than the old one but I think the top end is a bit too heavy in what you proposed. There just aren't many 6'5" WR coming out of HS at 220. There are 6'5" DEs that come out at 220 but get FBS scholarships because they have a good burst and a wide frame that the coaches know they can pack another 30 pounds minimum onto.
But like I said I like your system much better and I'm glad you got them to change.
I think the next step has to be linking tendencies with weight as rudy suggested. No more 5'8" 170 lb possession receivers or powerbacks. Then they need to fix weight progression during the careers.
If every recruit randomly gained between 0 and 4% weight each year that wouldn't be realistic either though. Weight progression should ideally be a hidden value like Potential attached to each individual recruit. Some guys can gain weight while others can't. That should allow for still having guys like Desean Jackson graduate at roughly the same weight as he came in but also allow for others who started off as WRs to gain so much bulk they get moved to TE or LB to DE.
EDIT: Oops, I see someone already brought up my point. I forgot to hit send and Vanderbiltfan kinda stole my point in the meantime
