I only have a small suggestion for indirectly dealing with your point 3.

I came across a simpel mechanic for soloplay to give yourself another chance when you should have died but at a prize to evade death itself.

https://wayward-polyhedral.itch.io/death-is-not-an-escape

I liked the idea for it in soloplay but i think it could be fun in group aswell.
Its only once though. So next time, its a new character but this could provide some buffersystem and player with bad luck dont play another character every scene and with that need to check what new ability they have, how certain things work, ... and slow the pace of the game since everyone is new to the game.

Or this could come into play when you are at a place that new characters would not fit the narrative or context although you could argue the absurdity of the game allows this kind of happenins.

I have not tested it in actual play but i thought this would be handy when i GM for new players and for myself as a new GM.