I'm in a similar situation. I have skating experience but was off ice for a year due to injury, so I also take LTS (mainly so I can get some practice in mid-week as there's an LTS practice session just before class). There are 7 adults in my class. I'm the most advanced as I can do everything except pivots, mohawks, and inside 3's; There's one guy still on the boards. Fortunately, the group coach is by coincidence my private coach. In group exercises like xovers, I'm held to a higher standard, he can also point to me and tell me to 'go practice' something, and know that I'll do just that while he works his way around the other students.
So, while the stuff is not all that exciting I take the attitude that it gives me an opportunity to practice doing the basic skills better. I have weak spots, so the time spend grinding away at them is good. For example, on crossovers I work on extension, smoothness, power, underpush, etc while the others are still at the just learning stage.
It might help if you expressed your needs to the group coach, if you haven't already. If you're like me and not every element is perfect, note that it gives you an opportunity to work on performance issues (flow, power, etc) in an environment where a coach can give you tips that would be beyond the capacity of real beginners.
Because I like to skate at least once mid-week (and hockey eats up most the mid-week night sessions) I'll probably take Adult Basic until they kick me out. If all the coach does is tell me to work on progressives when others are working on forward xovers, or cutbacks when others are working on back xovers, or power 3's when others are still learning threes, it's time well spent.
(PS I flat tell coaches 'I don't jump and I don't spin.' Figures and dance is all I care about. I'm pushing 60.)