Are you planning to add damage splitting by target in next versions? That's one of the features I really miss at the moment, and it is very useful in raid to find out who does the job right in complex fights.
One small suggestion: it would be great if you could display group names instead of "Group N" in configuration menu. I swapped group positions and added a few groups, and now it's hard to remember which group corresponds to which number.
I have a problem with Aloft: cast bar is extremely laggy for me. When mob casts a spell, cast bar appears, but updates with huge delays (e.g. 2 seconds cast is being shown for 5-10 seconds, with updates about once a second), and not as smooth as it used to be. I even had to turn it off, because I cannot rely on it at all. At the same time cast bar on Pitbull unit frames is smooth and quite reliable.