That's where we have different development philosophies, Tim. :-)
I don't think "stable" should be behind testing too much, no matter how finished or unfinished things are - BM is never finished anyways. There are many reasons for this, the most important is that it's twice as hard to learn a game that has different sets of rules in different parts. There is a lot of confusion on both testing islands now for people moving there from stable islands. Requests for oaths, etc. - and time and time again players must explain other players that things work differently here.
Basically: "If it compiles, it is ready to ship", to quote someone famous. Not quite, but you get the idea.