I'm not really convinced on the Sunny Day set. It looks "ok" but that's not good enough. As a supporter it's quite frail and just compounds weaknesses that sun teams already have, and as an attacker it's inferior to the more common Chlorophyll sweepers due to how easy it is to wall, and inferior to its own QD set too, since +1 Giga Drain is almost as strong as SolarBeam. It has a small niche and might be useful occasionally, but that's what OO is for.
QD should be split into two sets. Trying to cram LO/Lum/Lefties/Giga Drain/Petal Dance/Aromatherapy/Sleep Powder/Substitute/offensive/bulky all into one set is a bad idea. The offensive set should be exactly what's on site right now, except remove the Modest slash because Modest is dumb, and move Petal Dance to AC imo. The bulky set should be similar to what's on site, with Substitute mentioned in AC, and maybe an updated spread.