Hi TRich!
Back in the day we played in lots of theme leagues...
But yea as stated, the engine itself is the same, which is technically good.
The peripherals to engage the engine have been upgraded, so it's better than it used to be. Still could use improvements of course.
Better bullpen controls: not perfect (hopefully they are working on a V3 or whatever), but much better than the few check-boxes we had in the past.
Better reporting: You can see the actual rolls for then entire games now in the play by play. You can see season stats for ballparks rolls, defense, stealing, how many rolls off pitcher/hitter cards. More stats are always better!
Like mentioned, defensive subs (in game) and platoons are still as bad as ever. At least you have a depth chart now so you can change you subs for when injuries occur for the start of all next games.
Pricing is much better than in past games (much less bargains that swung teams seasons), but still the scarcity of the 200x games at certain positions makes it tougher. ATG has soooo many players now (compared to ATG 1,2,3), you could miss all 25 of your picks and still make a good team.