I think we should stick with fixing bugs as found (even if that process spills into 3.5.2). The current tests do a good job of making sure the basic functionality is in place and there has been use in the field. Also, you've already done a good job fixing a few of the most egregious bugs.
Likewise should have an aversion to temporary APIs like _collections and to API changes between micro releases. In general, this strategy is likely to cause more pain than it alleviates. So, put me down for -1 on this one.