Rolling window scenario tiers for mid tier

[wdesu]

There are many complaints about low mid-tier population (and rare mid-tier scenarios) and low lvl players being underpowered in T4 scenarios (3* lvls vs high renown players).
I think, rewriting matchmaking logic could solve those problems. Here's my suggestion: match players across a lvl window, e.g. 16-30, 17-31, ..., 25-39.
T4 scenario window can be shrunk to 35-40 or something like that or left as it is, this would give 3* players even more scenarios overall and make it faster for them to get to r40, which is something many people want too.
New system would also require some tinkering with bolster - either set it to 39 for all new windows or set it to the highest rank (this would need some more code, I suppose); and medallion system (should 25-39 scenario give officer medallions? I'll leave it for dev team to figure out).
In a perfect world, I would also ask for window size to be configurable through a command (e.g. if person wants to play only with people +-5 ranks from his and is fine with less scenarios), and also a command to revert to old tier system for anyone who wants that, but I feel like it's too much to ask in an idea thread.