Maybe this has already been suggested somewhere in old forums but I haven't find it.
There are people who lately farmed their xp peak level but in terms of it they also have tons of talent points which cannot be used. I am talking about billions of them (e.g. I personally have 2 billion tp which cannot be used since literally all my skills are at max.level, and I know about others who have much more).
It would be nice if there is some tool so tp can be used for other char combo and not only for primary one who farmed it. The way would have been to make one pool of tp for each char combo within the same char. After-all it was this char who farmed it so why not let him use it for his other combos as well?
If this is not possible there should be at least some reward for it like being able to convert these tp to exp via some pot with reasonable ratio. I find it like a huge wasting of tp where one char combo is overwhelmed by tp while when you switch to other one you are struggling to level your skills even if you farmed enough tp with the same char.
Just my few cents.