I am guessing the WR would go down as the number of players increase from 4 to 7.
Well, the Win Rate varies proportionally with the number of rounds per hour. The sims I ran assumed a constant 100 rounds/hour, which is pretty universally used, but may be wildly inaccurate depending on your actual rounds per hour. Thus, if you're actually playing 50 rounds per hour, your win rate will be half what I gave. With more players, you'll probably see fewer rounds per hour, so your actual win rate will decrease. However, the win rate per hand will be almost exactly the same with 4 players as with 7.
No LS applies to all casinos in AC?
According to CBJN, Trump Marina permits LS on its 8D games if you're betting a minimum of $50. Otherwise, no LS in AC.