I experience occasional battlescape crashes when ending my turn sometimes, where it just crashes right back to the world map, and it's like the mission never happened, the firebird is at the ufo site, idling, with all the soldiers, even the ones who were killed in the mission that crashed. If there was a save for the turn before this happened, it's be a lot easier to reproduce.
Obviously, battlescape saves don't solve all the problems, nor does it make the battlescape situation any more fun (Not that I don't think it is fun now, but it could be even more fun).
What I've noticed are the most fun maps are the ones that are largely open, with a buildings here and there. What seems to happen is the aliens can all move toward you each turn, but due to the landscape, they end up coming from different angles and at different times, although they do end up covering each other quite a bit.
The extremely open maps, like the farm one, aren't bad, but the openness tends to remove some of the tactical play, meaning you're mostly just shooting at each other from long distances. Smoke grenades keep these maps from being truly unfair, but adding a barn or some small buildings would probably make these maps a bit more fun.
The least fun maps tend to be very large, with complex hallways, like the military base mission, where the aliens mostly just get stuck in various rooms, and you have to tediously hunt them down in this giant complex. It's hard to keep patient through 20-30 turns with no action.