Why garen isn't played in LCS

It seems to be general consensus that garen has:

#1 sufficient damage

#2 sufficient tankiness

#3 a fine ultimate that fulfills its job well (although perhaps a tiny CD buff may help)

So what is garen's issue that makes him essentially UNPLAYABLE in LCS and even just higher ranks in general? He has ZERO CC and he has NO DECENT WAY TO CLOSE GAPS (remember that garen is ALL MELEE unlike other top laners like darius who can pull people in or cc in other ways). It's almost impossible to play garen in team fights unless you load him up with a bunch of anti CC and speed buff items (think mercurial scimitar and boots of swiftness and what-not) that then dampens his ability to do what he should be doing from the start (tanking hard and doing decent damage while waiting for an opportune time to execute someone before he has to run back/die).

His early game is absolutely fine and needs no buffs, and his late game doesn't need any sort of damage or tank buffs.

So I propose that his Q not only removes all speed debuffs, but also grants him immunity to all slows and makes stuns and snares 25% shorter for 3.5 seconds after level 4 is unlocked.

This should make it so that Garen can better close gaps between the enemy team without breaking his already sufficiently strong and bully-centric early game.

Thoughts?