The only reason PAC isn't overpowered is the difficulty in picking a card. Red card lets him farm really well, Gold is one of the best stuns in the game, and Blue lets him fix any mana issues he has.
TF is intended to be the champion who sets the bar for difficulty, simply due to a hilariously long-ranged harrass in Wild Cards, a comparatively low base range on his attacks, the difficulty in getting the card you want under pressure with PAC, and knowing proper placement of your Gate exit point.
That said, if you know your ping is over 75 or so, just don't play him. If you know the servers are lagging, don't play him. If your computer won't keep your FPS above 20 at all times, don't play him. There are tons of other champions out there to play, go play one of them.