I’m not sure which conversation you are referring to, but as we are full on working on v2, I don’t think there will be major changes like these for v1.
V2 has been rewritten almost from scratch, so these issues shouldn’t exist anymore.
I have a similar issue. On very busy models with lots of objects, the auto-highlight gets lost and things hang up for 5 minutes at a stretch. One way to get around this might be to implement pre-selections: Let the user select a grouped-line for example, then click the hosts->line option and have it auto-fill the currently selected object.