Yeah I kind of feel bad because I got him to make the nodes, only to have Epic basically say “Yeah, we don’t advise doing that”.
I feel like these nodes are really the only way we can take advantage of level streaming in a procedural way, so it is kind of sad. I am hoping that Epic gives us that ability in a future release. 
So I am actually in the process right now of re-working my instancing system so that I can move them around, scale them to 0, etc. I am currently using “Add Instance” node, but you don’t have per instance control that way. Trying to use “Add Instanced Static Mesh” which should fit the bill, but haven’t had the or energy lately to figure out why I can’t get them working similar to Add Instance.