If you're going to buff Tahm, don't buff his ult passive.

Buff his signature ability, Devour, or the ult active. Not his ult passive.

I like eating people and bringing them into/out of my team, maybe you can lower the self-slow on that? Or the CD at later levels? When I play Tahm, I never think past level 6, "gee I wish I had MORE damage on my autos right now."

Being a damage threat is nice and all, but we already have a bunch of bruisers and tanks who threaten to do a lot of damage if you let them stomp through your team unchecked. How about one who threatens to chuck your ADC into the middle of the enemy team instead? Or one who tosses your main tank away from the fight after disabling them for 2 seconds?

That sounds pretty unique to me.