I definitely like to see some symmetry - at least at first. I don't mind if the scene then moves in different directions.
A pet hate is when the speed of the scene is wildly different between 2 girls, eg 1 of the girls is getting fucked but the other one just giving BJ or having her pussy/ass licked. It might just be something about me but I can't really relax with the scene until both girls are fully into the sex. Obviously a little difference in speed is fine but when 1 girl is getting fucked the other guy(s) need to be getting into it or the scene loses a lot of heat I think.
Another bad one is when the camera seems to overly favour 1 girl over the other. Let's say girl A began getting fucked first and the camera has given her loads of attention. Then girl B starts getting fucked but the camera still favours girl A or maybe only gives a 50/50 split. Again I find it hard to relax into the scene because the camera isn't representing how I would be watching if I were in the room. That's bad directing when that happens.
I do like to see 2 girls both getting doggy anal at the same time and especially when they're facing each other and kiss or look at each other and smile. Also reverse cowgirl anal at the same time is great.
Generally LP do a decent job with 2 girl scenes I think but the above issues do crop up from time to time.
If there are more than 2 girls then I generally allow a little more leeway - I'm not huge on scenes with too many girls though....too much of a good thing!
More non-manhandle scenes please. Hands away from face/neck/shoulders. Keep the girls loose, free and expressive. Don't overpower them - let them sizzle! Keep the heels on. More panties pulled to one side. More skirts/tight dresses. More 0% pussy scenes.