It seems to me the contention found in this thread is one that has been familiar to governance over the millennia...that of "checks and balances".
While that subject is very deep, I just don't see the motivation for Dash Core to "turn off masternode payments" in order to sabotage the entire ecosystem or to abscond, even lacking checks and balances.
If they do this in order to incentivize the 12.1/Sentinel rollout, then so be it. Dash Core needs some understanding from an executive standpoint...I think.
Maybe I'm naive, but my gut tells me the team that has been assembled has their heart and soul in this. They're calling these shots. So be it.
I agree it's entirely possible that Core's heart might be in the right place.. although saying that, I also believe dash has been heavily infiltrated and compromised by spies, kot being one of them e.g. his involvement with Coinfirm. But it's not just that, there have been many strategic decisions and "partners" created with almost no involvement of the MNs. It was ok for Evan to execute his PR stunt regarding block-size, but when it really counts there's been nothing. All these proposals are about grants, none of them about strategic decision (except my own privacy-first proposal).
What I'm saying is, although it's important for Core to have their hearts in the right places, those checks and balances are actually far more important because they stop corruption seeping in.