I don’t think that’s a desirable endgame at all. If bots collide, one guy is a winner and one guys is a loser because they had different strategies and only one is right about the relative price movements. If you placed an order and it fills, you shouldn’t care it if got filled by a different MM. If you’re unhappy with the result then the order wasn’t placed in your best interest to begin with.

Market makers should be competing, not cooperating.

Custodians work for Nu and their job is to maintain the peg with market makers. BTS market makers work for themselves, it is the delegates who work for BTS and their job is only to provide price information for market participants. The market engine provides the natural incentives for everyone to independently trade towards the peg as best as they can.

Put another way, custodians are the only reason 1 nubit is $1 this early in the game. bitUSD was tracking $1 before there were any market makers, you just had to manually get out at the feed on the internal market which led to low liquidity.