Taming isn't top tier? I can't go solo most everything with a GD on my SW/mage/tamer? Last I checked, my tamer was my 2nd best character & my first choice to run for everything even though it may take a little longer than running my dragoon. I actually liked the control slot implementation. I believe that if they are doing what they say & just allow us to opt in to upgrading any pet from any control slot requirement to a higher one(make a 1 slot dog, hell hound, etc, a 2 3 4 or 5 slot) for the ability to gain in skills up to Legendary and beyond, taming will be OP again honestly... I foresee no one using anything but 5 slot 120-130 skilled Rune Beetles with similar str/int/hp to a GD because they are of the few tameables that can have 170 dex... Giant dragons covering your screen at EM events will no longer be an issue, this was meant to be fixed by adding Turtle Dragons but everyone knows that you may get 1/250 that are worth keeping and 4.1 or higher statted. I can spend 30 min at wind and generally get a few 4.0+ to spawn vs doing 2-3 turtle spawns in an hour and then having to wait 3 days to see 2-3 garbage turtles that I spawn at DH so they help me kill him faster because they aren't worth taming.
As for skill gain, taming to 90 from fresh char 50 isn't actually that hard, drop all skills to 0 have nothing but taming/lore, use GGS to gain skill uber fast. Once you hit 90, spam combat training>wait for targ>last target macro with any pet targetted - get 90-120 in about 9 hours. I think it took about 1 week at a 1-3 hours a day to get my 2nd tamer from 50-120.
edit: only edited because I had accidentally hit a g key that was randomly typing a in to the box without me noticing