Not really. You can't escape on-chain scaling constraints if you mandate unilateral exit. There is only so much juice to squeeze. Look into the thundering herd problem.
I believe there is a very real constraint limiting privacy and trustlessness and most L2 maxis are trying to solve an unsolvable problem. Haven't dug into this theory very thoroughly but there are very strong indicators that this is the case. If I wasn't busy fixing mining I would be thinking and writing about this tradeoff.
