Most people that have played with or against Thresh can agree that there is something lacking, or just not quite right. Here are my proposed fixes:

The Problem: The windup for Thresh's Q is an obvious tell and a cast delay that makes hitting anything with it almost complete luck.

The Fix: Get rid of the windup.

The Problem: Thresh's ult is on a very long cooldown, does very little damage, and has no hard cc.

The Fix: Make it so the damage and slow from breaking a well is a small aoe, enemies are effected by more than just one wall, and all walls do the same amount of damage. This will make his ult an actual threat, instead of just a, "oh, Thresh ulted? Damn, didn't even notice."

The Problem: Champion souls are worth the same as cannon minion souls.

The Fix: Make Champion souls red so they are more noticeable, and make them worth three stacks rather than just one.

If these changes are implemented, I think Thresh will be up to speed with the other supports in the game.

I hit with my Q 9/10 times. You have to anticipate where to aim, depending on the champion and the player using him/her.

After reading, here's my verdict: Get better at skillshots, and learn Thresh's combos.

Ya these are a few problems but one of my problems with him is compare him to the over supports, other supports have a lot more threat in lane and contribute a lil more in lane but in team fights with thresh u can maybe rlly good at peeling ur carry but i find it very hard to do much with him. for example a lot of ppl compare Thresh to Blitz, except blitz can constantly e someone in team fights gets tanky just like thresh and blitz has silence which can interupt ppl just like thresh.

One of my main problems on thresh is his Flay not scaling with level because later in the game as a support u want to be very disruptive of the enemy team and its very hard to do this with a 9 second cs on Flay (not counting ur cdr) late game.

Overall his kit looks very fun it just needs some fixes/changes/buffs.

Some of those changes are nice. But IMO, he is too powerful right now, and needs nerfs. But I would be fine with him either way.

His ult does no damage? That I don't agree with, the first enemy hit gets nuked hard, his ult is a 1:1 AP ratio, and he gets AP from souls, pretty good deal.