There are many complaints about high fees and long queue waiting times. The market does give a fuck and miners are going to answer its demands.
If you're complaining about TX fees of 15-30 cents, you don't have money to move the market.
In the market there is always a cause and an effect, it will definitely be interesting to see how this all pans out. Something has to give but I'm not entirely sure what it is yet.
This BU stuff has zero relevance to the price.
And AFAIK moving to Schnorr sigs at minimum requires implementing Core's segwit soft fork.
Yes, Segwit would make that upgrade quite easier. I think that is one of the current plans post-Segwit anyways.