Older character strength and possible future buffs?

With older characters (5* mainly) they have fallen from grace (venti, Klee, diluc) when comparing 1.0 characters to 5.0 characters. I saw that HSR is buffing older characters so they aren’t completely useless. Do you think Genshin will implement this in the future? Buffs to constellations or just character ratios??! If they did what character and how would you want to buff them. Mine would be to update venti and Zhongli constellations to make them as cracked as current archons. (c2 being insane upgrades for raiden, nahida, furina and mavuika)