I have BetterReplication in my live game currently and it has done wonders for it. My games consist of usually/potentially fast moving rolling vehicles and I was noticing a slight lag difference from movement and player interpretation. This has completely fixed the problem and has been rock solid so far.
I just implemented the latest update and really liking the new structure. So far, everything feels good.
Quick question, do you see an adverse effect having the stud replication (distance to stop replicating) to 0?
To answer your question; If you set it to 0, that means that everyone will always be out of proximity relative to each other. That means that BetterReplication will not actually actively interpolate on any client. If you want it to always be active regardless of distance, you could use something like math.huge.