No, Kabal is fine, you would have to buff other characters, not nerf Kabal because the fact is that there are still tons of stupid shit like:
Landslide MU's between other characters...
Almost everyone having a huge issue against Kenshi.
Characters with Armour, great pokes and fast mids also having small hit boxes.
Characters with shitty mids or no armour or no counter poke game - due to shitty mids (The poke doesn't mean anything if opponent can just cross you up after a hit D3, Raiden for example)
Cyrax/smoke resets.
Invincibility on wake ups (No need for it in the game at all)
Only getting up from the ground with a delay, roll or wake up...(why no more options?)
The frame advantage for pokes on standing hit should be much larger, also make pokes on block more punishable, there needs to be more consequence to non hit confirms.
Characters with great mids and highs being also given the same speed uppercuts but giving shang, sub, ermac, raiden for example shitty uppercuts along with slow mids.
Characters with great ways to escape pressure, fast mids, boss pokes also having armour...
Special moves that advance being only -3 on block...(sonya cartwheel, Cyrax Reverse Kick)
Characters having projectiles that are so slow they are unusable. (Jade, Nightwolf, Cyber Sub, Baraka, Raiden, Rain)
Nightwolf having a reflect that doesn't reflect.
Chaining specials from pokes with great cancel advantage, why is this possible (You can poke someone on block and punish them with a special for confirming your block...)
This game shouldn't be played on a fundamental level, it should just be Kabal, Kenshi and Kung Lao to the death.
The only thing that should change about Kabal is cancel-able armour, and drop the damage on his AIF's.