I would not comment on the technical aspects, which I'm sure are good.
I think it's a good idea to attract Django users, with *migration tools *towards web2py. But adding those features as *permanent *for web2py could mainly forces the web2py dev team to redirect time, energy and effort towards maintain and improve this Django and Alchemy integration. Time that can be well spent maintaining Web2py. Because users who use them will prompt and require more and more support on it.
