How do you feel about healer in Mythic+ ?

I'm currently clearing +17 as disco priest and, damn, healing feels really hard compared to last season.

AoE + target damage often deals 80% of one's life in 2-3 sec and it always needs fact reactions, combined with the 25% healer nerf at the beginning of the season, dungeons feel much harder.

What's your opinion on healing ? Is disco much harder ? Am I bad ?