Yes, regarding post/topic fatigue - too often these topics are simply used as excuses to do nothing. I will not do anything until I decide logic which is BS.
Remember to act! Any one of these (Vanguard, Schwab, Fidelity) if you use right products (index funds) is much better than what you have now, so stop procrastinating, decide, and move forward. Flip a coin if you have to, do not use this as excuse to pounder and contemplate.
on to specifics
1. Fidelity/Schwab provide arguably better user experience and interface according to some (myself included) and access to many products Vanguard does not do or does not want to be bothered with (credit card integration, cash management features).
2. They will never, ever be beholden to you in the way Vanguard is. they will ALWAYS be responsible to their owners/shareholders, and they will ALWAYS put interests of their owners first as they should and must do.
To me that is enough to use Schwab and Fidelity in areas I want and focus on Vanguard with everything else. Again,
a) set a first timeline for the 'decision'
b) decide (flip a coin if you must)
c) act