Last-Outlaws!! Has been a non sandbag alliance and taken very drastic measures to ensure all members have a good time. I don't agree with saying the bottom x don't count. Yes, this will severely punish sandbagging, but would likely have to exclude 50% of the alliance to be effective. Furthermore, it promotes straight alliances, aka putting your std dev as low as possible, inadvertently punishing alliances that have atomic,global,industrial, and Enlightened even.
I don't care if you want to sandbag, I really don't. But I do care that your alliance faces a team using the same strategy. That's a figurative you btw, just so no one gets their knickers in a twist.
a weighted average would be a milder approach withought the punishment.
aka.
atomic are weighted at 10x the war xp
global at 9x
industrial 8x
etc etc.
this is a more appropriate approach that allows for smart methodology and furthermore appropriate measurement of change.
Chris, having a weighted approach where lower ages count as less weight, is mathematically almost identical to excluding the bottom 20% or so of an alliance in the matchmaking equation. It lessens the influence they have on the match. If its done on an alliance that is somewhat mixed (EA-AA), its a nominal impact....not even a whole lot if there are real, developed GP bases. If its an alliance with several undeveloped bases at the bottom, its a huge impact in either your solution or what Clint mentioned. I cant think of a scenario where one is really different than the other. Like you, I would disagree with something as dramatic as 50%, but I dont think it needs to be like that to both solve the problem and still be fair in matching. There is already a glory penalty for above 30% of a sandbag, its why we rarely see sandbagging past 10%-20% now. Its the sweet spot for sandbagging because it dramatically alters a match while carrying no penalty.
If it were set closer to 20%ish...it really wouldnt change the weight of non sandbagging alliances much at all (no punishment), and you'd be matching people with equal scenarios. We watch levels in our matches. Our bottom 5 often drop our average level by 5 or less (we range from Atomic to Industrial, occasionally 1-2 high EA). Whereas we see 5 undeveloped bases often drop levels of sandbag alliances by 30-40.
Anyhow, just my thoughts. I think if they excluded 20%, and fixed the atomic glitch, it would improve matchmaking 1000%. And, if we want any solution, there will have to be some sort of compromise I think.