Same tiers and champions like previous patch.
Sett, Senna nerf is not enough to ruin these champions or put them a tier lower.
Rakan is still S, and you should have him s+ if with xayah ofc.
Soraka is not S, tier however you could put her over pantheon.
The shared XP changes doesnt ruin supports, supports its more about the impact the roams has not the individual gain of XP.
With ashe being meta zyra can be S together with Ashe and in a good matchup.