In unrated mode, why not let the premium user specify any number of categories (tags), as well as rating range? It only makes sense that when you can see in which categories you are weak, you should also be able to train spesifically to do something about it.

(I have a feeling this might be underway already, but I added the suggestion anyway, just in case.)

No update on this? Would be great.

I agree it sounds like a good idea. It's quite embarrassing how I fail the "hanging piece" problems over and over again. I would lie if I said I never miss hanging pieces in my own games (even with long time control).

I thought about this a while back, but assumed it had already been considered. Its a great idea!

I just saw that they indeed have plans for this in the future

http://blog.chess.com/webmaster/recent-site-improvements2

"(Later on, when we roll out "custom tactics sessions" - where you will be able to choose what kind of tactics you want to practice - this graph will help you choose where to focus your energy!)"