Indeed. I've seen a number of stuffed-up multi-lane roundabouts in the States.
I've also seen a trio of 3 of them be adjusted (by changing lane markings and signage -- nothing of grand expense) in a way that was much more sensible and easier to follow than the original design.
It seems to me that a lot of the issues with them could be eliminated by having a bail-out path that is both safe and acceptable.
Logically, it seems like this ideally means providing the opportunity to simply go 'round again and do it over.
Or where that's not possible and there must be a lane with an irrevocable default exit, then: That exit should be low-cost and provide an opportunity nearby to safely stop and spend as much time as it takes to re-evaluate a second attempt.
It should never dump a driver into an unexpected 9-mile-long Pavlovian clusterfuck.