And, more of a pipedream, I'd like to see Spell Speed and Skill Speed combined into Speed, for TP refresh speed to scale with Speed (giving 50 TP per GCD instead of 60 per 3.0s), and for Speed to affect AA and oGCD damage similarly to Det and Crit, though Det and Crit may then be scaled up slightly to retain equal stat weight. Having the "complexity" of an optimal stat does not lead to increased choices. At best, it only makes the search for your next best piece of gear a tiny bit more pressured and mechanical.
For the same reasons of future-proofing I also hope that DRK eventually gains some means of managing TP without Unmend spam, but at that point the Shield Swipe TP advantage would be even less unique, and likely the only means of TP management among tanks that costs that much dps, unless changed. If PLD support-heals ever become worth using, that in itself should aid significantly in TP management, and just as DRK should not only have means of TP-management outside of Grit, PLD should not only have means of TP-management while MTing - though the comparison may fit their archetypes...
Edit: And I'd like to see Vitality increase Attack Power-based self-healing, roughly equally to Strength (applying both to direct heals like Clemency and boosting the healing done from damage as in Inner Beast), and Defiance and Convalescence to affect Ability healing, both one's own, like Clemency's self-healing and outside sources like Lustrate.