I think there are a lot more YC founders anxious to make a smaller exit than YC partners anxious to see small exits. IMO the problem of YC pushing companies to accept liquidity simply doesn't exit.
they might very well benefit from a lot of very quick exits
I fail to see how. Before they closed their Sequoia round, you could argue that smaller exits help YC keep afloat. With millions in the bank from outside funding, YC is beyond the point of trying to keep itself afloat.