Most of your list would probably remain intact. The main issue is that Go has a traditional garbage collector, and Nim has ARC, ORC, nogc, gogc, deferred reference counting, and more options for memory management.
I'm using the literal definition, "an important topic or problem for debate or discussion." By the main issue I mean the main matter of discussion/point of interest/topic to cover. Not suggesting there is something wrong with Nim's having various means of memory management. Default currently is refc (deferred reference counting) and it's reasonable. Arc is better for some use cases but not as ironed out as refc.