Riot knew damage would be higher, and didn't give more tank stats out...
The new runes have given many ranged supports much higher poke damage in the early game, making it more punishable for Tanks to cash their Spoils of War stacks. We're giving the heal on Targon's a small bump to ensure they still have ways to secure their gold.
OFC they knew, and then didn't buff more base stats.

feels a lot tankier. Thier jg
was ridiculously ineffective. But then his timing was also bad.