A couple things about the new game engine...
Yes, from all accounts it should only be implemented in scrimmages and PLs, so those block performances should not reflect a change in the GE. I'd be interested to see where those blocks game from as well - their bigs? guard's drives? defending outside? I'd also be interested to know your new guy's SB rating, and compare that to IS of who you were going against (it looks like one game was against Smedlock's trainee, which could explain some of it).
I've actually had better performance in my PL (with the new GE) with my LI offense than in this league. It's my opinion that while the change to make shot blocking more important will eventually even out the LI dominance, it may take a little while. If shot blocking becomes more important in defending the inside game, it could make a LI offense even more successful if the defender's shot blocking skill isn't very good. For example, if a 15 IS goes up against a 6 SB, what do you think will happen? There are countless bigs who have ignored shot blocking altogether, so until their SB catches up, you may see LI be just as dominant in certain matchups.
What I think the change does more is make it more difficult to create LI monsters, which will even the playing field. It's been too easy to focus on only IS, ID, and REB for a successful big, while successful guards need OD, PA, HDN, DRI, and JS/JR if you're running an outside offense. The addition to SB in the training plans will slow the rate of IS being trained, thus making it less dominant.
Just my opinion.