Do products like Ditra make tile removal more complicated?
Tile is generally installed as a permanent fixture.  Removal is intended to be difficult - in fact easy removal is a clear indicator that the installation wasn't done well.  The sub-material is often destroyed in the removal process because of the force necessary for removal of the product.

DITRA, being textured, would hold onto the mortar used to mount the tile.  The only thing more complicated about demo where DITRA is involved is it's one more layer to be removed.