Suzip,
I know that 6 month marker well. Although I was fortunate not to have any major long term problems, I was also a little bit disappointed that the six month post-op marker didn't yield more results. I still have minor balance problems with some days better than others. Balance exercises do help, but unless I do them faithfully every day I take a step or two backwards after a very short time, and being SSD even with a BAHA can be challenging at times, although without it, it would be much harder to cope. Your balance will continue to improve if you work at it, although it may never be as good as it once was. Other issues may or may not improve with time and/or therapy. Improvement doesn't stop just because you're six months post-op though. There is always a chance things will continue to get better.
Hang in there and feel free to vent here anytime.
Best wishes,
Wendy