Everyone is asking to nerf Tahm in the wrong area
Yes he is sticky and packs a shit ton of damage with that stickiness, but the real problem is that his E is a 1 point wonder that allows him to double his health bar.
Make the shield to Grey Health Ratio scale with levels where its something like 60/70/80/90/100% of grey health converted to shield
And then reduce his slow on his Q. Boom Balanced