The class size is currently 176, but I believe it will go up either 10 or 20 this year because they are adding the Montgomery campus. I am not sure on this, though.
I'll go ahead and add to the speculation as well, haha. Last cycle they tried to make the class female heavy by accepting a lot in the beginning (from what I gathered), and our class still has like 30 more males than females. So I would bet that they are again trying to get as many females committed as possible first.
In addition, I do think they have changed their approach towards OOS students. They still can only end up with a certain number of OOS (around 25 I think, although that may go up this year if the class size increases) because UASOM is state funded. However, they can go ahead and accept 90 (hypothetically) OOS students right now, with relative confidence that only about 25 of these will end up committing here (probably because OOS tuition is absolutely absurd). And since they never have more than 176 acceptances out at a time, a large portion of those could be in the hands of OOS students. Thus, the whole thing becomes a waiting game for a lot of people, and tons are accepted off the waitlist in the end. A few years ago I think they misjudged their OOS acceptances and ended up sending too few and receiving too little interest, so they are now overshooting on the OOS acceptances if anything. Just my speculation, though.