A useful feature would be some indication of how many points are left at the current "Required level"
For instance, if I dart up the tree of one soul and take the 31 point talent, it says required level 31, which is accurate, but I'd have 7+ extra points to spread out without bumping the required level up higher, and the only way to discover that right now is to add points until it finally bumps up the required level, then taking one away again :)
Alternatively, a way to set the max level and having it base off that many points instead of 66 you get at 50.