For me the trains, people mover, etc, should be able to run either as a single station loop, or as transport rides. The code is clearly there as some of the rides work that way, they just need to be activated to allow them to operate each way. Almost certainly easier said than done, but I can't imagine it would be the most difficult thing to deal with.
But, in terms of prioritisation of work, I'd much rather guest pathing and AI, management tools, etc, get dealt with first before the little "nice to have" things.