So... Those accidental Quinn changes that got reverted...

If, hypothetically, you were able to switch between Quinn and Valor at will I would have no issue BUT:

1. Skystrike would still need to be there. Even if you can switch between forms every 3 seconds, keep Skystrike and put it on an independant cooldown. When it comes off cooldown, the next time you use Tag Team instead of Tagging back out your R would become Skystrike.
2. The movement speed it provides would have to be toned down so that it only grants, as an example, only ~50 movement speed (just enough to outrun an immobile champion) or perhaps ~150 that diminishes to ~50 over 3-5 seconds.
3. Just take the blind off Quinn's Q in both forms! The only thing it does is add unnecessary utility to her kit which is counterbalanced by not having as much damage in her kit. I'd much rather see a higher Base Damage/AD Ratio on her E than have a blind needlessly tacked onto her Q. Perhaps instead of having a blind on her Q, it could have a conditional effect i.e. If the target is marked with harrier it will consume the mark and reduce Q's cooldown by X number of seconds.