It'd be hard to point out the problem spots without re-watching the film, but I'll definitely be re-watching it in the future so I'll be sure to keep notes about where the problem spots are in the future.

And I can see what you mean about the Twins' introduction. Maybe I was just too used to how they were handled originally, because looking back I think that they are much more balanced now. None of the other Autobots get an intro in the movie, and since the Twins are now reduced to bit players it wouldn't make sense to give them one either. If a viewer can get past how the other Autobots are handled in the movie, the way the Twins are introduced in your cut shouldn't be any harder to accept.