Tokyto, I certainly agree that it is frustrating to find the ideal pool size, what maps people like, etc.
However, I think in your position it would help to test the maps in it a bit BEFORE putting them into the pool. Recent issues that have been discovered such as flooded niflheim having double reclaim, cold place having imba starts as one is closer to the reclaim, etc are the real damage-doers here.
Since there are folks willing to test things out, I think it might be nice to propose some maps that are new or uncommonly chosen to be played first. Ask me any time and I'll give a run through.
This also became apparent during one of the tourneys where you used farms map which had an issue and it caused people to load four corners.
Other than that I'm happy you are testing the pool size a couple more times. In my opinion the larger one will win popularity (this time around) but it's certainly worthy to play both some more.
In all seriousness good job on this decision.