A general fix across "all" classes I'd like to see is to increase TP/MP generation proportional to Skill/Spell speed and reduce animation delay in the same vein.
Frankly, I tend to avoid skill speed simply because of these two factors. I burn out much quicker and activating OGCD abilities becomes harder. This is...not exactly ideal IMO, since, well...it is fun to operate on a sub 2 second GCD! But when you deal with constant TP issues where you usually had none before...yeah.