0.48 change "floating blocks cleared on map initialization" has severely damaged a lot of my work in progress maps and objects. Small objects are difficult or impossible to represent without floating blocks, anything diagonal suffers. There's nothing inherently wrong with floating blocks, when one is destroyed all connected blocks fall which is fine. They give the map maker a lot of flexibility and what you see is what you get (vs everything disappearing).

Floating blocks should be allowed in the map on initialization like before.

You have a good point there.

Here's an example:

http://i.imgur.com/12zAe.jpg