Welcome to the forums.
Until now you will get the best results with atheros based cards that supports master mode. They work great as an FakeAP. When we get a card to work in master mode, we can say that we are simulating with software a "real AP". I also tried with zydas based USB (zd1211rw) and the results where good enough.
I asked darkAudax and MisterX from aircrack forums and unfortunately they don't have any recommendations to fine tune the airbase-ng.
I must say that probably any other card (except Alpha) will work much better as an FakeAP.
Finally since I am working like a dog lately, I will not respond that frequently here in the forums. I promise you that at least one time per week I will come back here and respond to your questions.
Thank you for your kind words. I can wait to find free time to add more modes in the script.