I've been thinking of how to handle the issue of accessibility of Cavernous II, which is a game in which you are in control of multiple agents and need to find optimal routes to goals using them. After a lot of thought, I concluded that the best way to resolve this would be to abandon the idea of multiple timelines entirely, instead opting for a single timeline where all agents can be controlled. This is rather similar to how most games handle fine-grained control of multiple characters. I don't think this system would work well for the game as it is though since a: such a method would lessen the benefits of existing routes from boosts, forcing one to rewrite routes just to make minor edits b: the routes in cavernous are quite long and this system makes creating routes more time-consuming.
I've also been thinking about the primary mechanic of a somewhat old mobile (non-incremental) game called Robotek, which is choosing a slot machine, pulling it, and then performing actions based on the results. There's a significant amount of luck but also a significant amount of control. I feel like such a mechanic can be transferred rather seamlessly into an incremental context. Dunno Dice has a similar mechanic (the primary difference being that you gain resources instead of taking actions) and I find it to be a fun game.