Why would support Cho be a bad idea

Reason 1: Feast stacks means taking farm(or kills). Solution:

Reason 2: Vorpal spikes will naturally push the wave regardless of the situation. Solution: toggle off when unwanted.

Reason 3: I got nothin' here...

I like it, only downside is Cho's huge dependence on items to be relevant. But he has peel, a good silence, and decent damage ratio's... I'm actually interested.

Cho sustains comes greatly from taking CS, Hp wise that wouldn't be a problem but mana wise is huge. You would run oom after 2 spells early game. That ignorig the fact taht you will scale soo poorly

Mainly it's that Cho'Gath has a bad early game and depends a lot on scaling with AP.

Also depends on the ADC. Some adcs are chill but many of them can be mean. perhaps duo laning with a friend to try it out in a normal game might help. :)

Biggest prob will be Mana Sustain, his mana costs are pretty high. Normally less of an issue because of his passive giving him mana return on last hits...but he isn't going to get much of those as a support lol. He also is fairly gold reliant to be a threat. Support income isnt going to allow him to get beefy enough even with his free HP from his ult, nor is his damage going to be meaningful. Also he is melee, so when he is low on mana he is going to be contributing nada, and get poked out hard by the enemy adc and a ranged support. Less Reliable cc than other melee supports, so his gank assistance is mediocre. His only real strength is as something like a leona counter. =\