Presence is everything. TP is OP when used right, on any role.
I honestly don't see why some higher elo's don't run revive/TP. I know the aim is to die as few times as possible, but after a lategame teamfight. How is that heal of 400~ hp gonna do more than you being right back into the fight and at full resources, if you did happen to die? Then again this would require getting revive and tp, which means no flash, which isn't happening.
I guess the epic players know something I don't about it. Probably something about knowing when to back and having homeguards anyway, tho they only help on the way out of base.
Still think every champ should get flash automatically, and remove it as a summoner spell. We're in league of mobility anyway, people with 2-3 gap-closers and decent damage reign supreme. If everyone could get atleast get a free flash without having to take it as a summoner, we'd see alot of new lane strategy and different spells being used. Everyone takes it anyway.