it would also be interesting to just have a universal dump for each base class that does something interesting. not sure how it would be supported in the UI, but basically you have a warrior dump talent, a mage dump talent, and an archer dump talent. you can spend any excess points in any tab into that talent with no maximum, giving some slightly beneficial but mostly goofy affect.
spit balling some examples:
warrior - increase size and slightly increase range, I imagine this would also increase your hitbox? (warrior big, warrior have long reach)
mage - being OOM makes you unable to do your basic attack at range, but you can whack mobs with your staff sheleighleigh style adding scaling tiny fraction of your wisdom to your base damage.
archer - projectile speed is increased, this does not affect attack speed.
jman - its a secret. no really. it should just be a dump talent that does "something" but your not told what it is or how it works. could be .002 drop rate and then the next level adds 1 base damage, and the next adds .01 speed, etc etc. ideally it would be a randomized list of micro buffs that get cycled through. adding imperceptible gains, but gains none-the-less.
again... these are just dumb things off the top of my head that seemed fun but also have a semi useful effect.