Every system will have it's flaws, so I will propose an addition to any of these systems.
The way they work currently assumes that someone who will star a map will do it occasionally, but what if you have 1 person starring every single map from certain creators just because he's a fan? (I have nothing against fans though, so don't take this post as that kind of discussion)
What if you have many people doing that? This also assumes that they are doing it of their free will, however what if they're asked to star something and they do it? That's pretty common nowadays, and while officially it's bannable, it can be done through chats so that noone even knew they were asked to. They won't tell anyone and they don't really need to, that's why I said it's a flaw.
This is all hypothetical ofcourse.
So what I propose is some kind of a daily/weekly/monthly limit a person can shoot stars at a map. This may increase if he is active in the mapping community, so this means that if the person does modding of some kind, that limit may increase. (Daily limit may not be as useful, but I just wrote it to give some sort of a timeframe suggestion, people can take this as they want)
Just as I wrote in the first sentence, every system will have a flaw, and you can't please everyone, so be prepared that for any system that's suggested will get exploited as much as it can.
The only real downside I see atm is the amount of MAT and BAT people. Due to whatever reasons, be it personal or official, doesn't matter, some may not be able to mod maps. With having literally thousands of maps ready to mod, and several hundreds are ready to be checked by a MAT or a BAT, having this few of these people really doesn't help in any system. Others just have a massive queue and I bet it gets depressing sometimes when you look at the number of maps.
I am just stating the obvious here and apologies if you take it as a hostile action, however that's how I see it. I also have some other opinions I could voice, but I chose not to because they are not relevant to this discussion.