@Davin, in what time can you fill in the missing tests and documentation? If this is something you finish do before alpha2, I'm inclined to leave the change in.
As it stands, I missed the controversy yesterday as I was busy making my first release. So the merge *got released* in alpha1. I would prefer to fix the missing pieces forward instead of reverting and re-submitting which will only thrash blame and history at this point.
FTR, I do agree with Antoine, Ronald and others that in the future such big changes should be as close to their ready state at merge time.