I have low reputation as you see. And the problem i see with this is, that when i try to troubleshoot someone's question that requires some active or continuous communication, or a suggestion like "try this if it works", then i probably won't put all of these above into an answer. I'd like the commenting to be lower on reputation to about 10 or 15. Or maybe, Someone could add a function similar to a comment. Called suggestion for instance. Have a comment and a suggestion on 2 different spaces.
I would lower the comment reputation requirement to e.g. 20 and add comments of users below 50 to the "First Post Review" queue. It is usually the emptiest one anyway, so that should work.