The whole concept of IPR is a great one. Having the ability to unlearn skills and learn new ones is always refreshing.
It would be much cooler if we got say 2 IPR per level that worked on any skill except Map Navigation. Getting IP points per title level is like giving us a single cherry from some lucious banana split waiting to be eaten.
Another thing that would be cool for team missions is the entire team could get 1 IPR poiint for each team mission boss they killed.