From three plays of Shadows in the Valley on Madness I've already got two 3* Colourless Evo Shards and two 3* Rainbow Evo Runes, so the drop rate changes seen to be great. Not sure on the character changes yet. Doesn't seem as bad as people say but I can certanly see a difference. I'm surw it'll be fine and I'll get used to it and ultimately forget all about the changes.