Why is grievous wounds being buffed back to its original state?
If it's just to nerf Soraka (and it probably is), then sure, but that's a pretty terrible idea since Soraka isn't the only champion who heals others (Nami, Sona, Janna, etc). Not to mention that GW is an inherently badly designed mechanic (as Riot themselves have ironically discussed many times in the past), mainly due to its binary nature that goes something along the lines of "I applied this common status effect to you, GG".
Soraka was basically designed to be easy to nerf/buff. There are tons of levers on her to adjust; in fact, Morello and Vesh (the rioter who reworked her) even acknowledged this. Healing too much? Nerf her heal value/cooldown (not that this should be done considering her identity). Building too tanky? Nerf her heal's health cost. Restoring too much of her own HP? Nerf Starcall. She has too much CC? Nerf Starcall/Equinox. Too much CC because of an unnecessary semi-rework? Revert it. Restoring too much of her own HP passively? Nerf her health regen or nerf Ancient Coin since she's basically the only champ who uses it. etc
Why nerf Soraka in the worst way possible (in terms of general game health) when there are so many better ways to balance her? I say this all as a Soraka main, and I don't think restoring GW to its former self is even remotely fair to other caster supports.