There is a fine line here. We do need to make people clean up lax code in order to improve numpy, but hopefully we can keep the cleanups reasonable.
Oh agreed. Somehow, though, I was surprised by this, even though I keep tabs on the numpy lists -- at no point did it become clear that "big changes in how arrays get constructed and typecast are ahead that may require code fixes". That was my main point, but probably a PEBCAK issue more than anything.