I'd like to see 2 things: 1) I'd like to see racial trees improve just enough to make them competitive with class trees, particularly at the lowest tiers; and 2) revisit the idea of racially unlocked trees like elven arcane archer and how obtaining them works.
Many of the racial trees require too much of an investment of points to get anything good and are still short in value when compared to what you could get for the same amount of points in a class tree. One example, if for some reason I decided to make a half orc barbarian, I can't imagine trading points from any barb tree for half orc enhancements: 8 points total to get lock-bash plus feat, 16 to max improved power attack, and 19 if I wanted full power rage. At the very least I think we could reduce some of the AP costs from 2 points to 1. Half-Elf Dilettante improvement points are also very cost prohibitive as is Elven Arcanum. Spell-like abilities that consume dragonmark uses are absolutely never worth taking in my opinion, but if you gave them an sp or hp cost, removed the limit of uses per rest and perhaps lengthened them to a moderate cooldown, I think they could be both useful and balanced to casters and other classes alike.
I enjoy arcane archer and would like to be able to use it on some elven archer builds, maybe fvs, ftr, rog, arti or clr, but 14 relatively worthless points in the elf tree is crippling to a build. It would be nice if instead, being an elf unlocked AA for free selectable in addition to class trees like Harper is. To keep elf balanced with other races we could include other archetypal racially unlocked trees as well. It would be cool to see dwarven defender, resembling stalwart defender most likely, finally become available for dwarves as it was intended earlier in the game's development. For halfling could be acrobat, drow tempest and half orc berserker or ravager. Human is pretty strong and adaptable as is and I don't think it needs another. WF and BF trees are also pretty strong but WF Juggernaut would be interesting though I'm not sure what it would be based on... I'm not sure the racial tree revamp would need to be applied to Iconics but Shadar Kai - Assassin seems most obvious, probably PDK - Vanguard and Sun Elf Divine Disciple (Only relevant if you use a +heart of wood).