Regarding the governance of the protocol, I think it is not very difficult to reach a consensus if it is a simple fact and everyone understand it. However if you go the radical or complex route, then your fork will just become orphaned
BIP101 is rather simple really which is one of its advantageous, Bitcoin Unlimited might be complex to understand in terms of all of the game theory, code and economics, however the underlying concepts are actually rather simple to understand, just like the Bitcoin protocol itself. Everyone has the freedom of choice.
I have played with several altcoins since I know bitcoin, but I quickly realized that the current cryptocurrency economy only focus on one coin, for the simple reason that people don't come here seeking for inflation. You have some mainstream economic knowledge that is weaved by banks to confuse the majority of human, so no doubt you will draw conclusions that does not fit reality (Reality is that none of the alt-coins will thrive, including banks' alt-coins)
If you look from the view of the central bank, the most important for a monetary system is trust. One of FED's mandate is moderate inflation, because hyperinflation will destroy the trust for their money
BIP 101 shakes investor trust since it is too radical, and BU is even more radical. When you are facing a change that no one has done before, you can only act conservative and prepare for the worst, not act radically and hope for the best. Thus the motivation behind BIP101 and BU is questionable: Why take huge risk when you can take less? Are those devs all illiterate in finance and don't' know how to manage risk?