This is not exactly a question, but a finding that I think should be easier to find and that puzzled me for a long time.
This was a post made by user Morio that was lost in the thread it belonged to and I though I should give it more attention:
http://blenderartists.org/forum/showpost.php?p=1443193&postcount=9
The thing is: blender does not remove multiple edge loops at once (and I hope it will be able soon), but following what Morio says, instead of selecting the loops you want to delete, you select the ring, or rings, that are connected to the loop. Pressing alt+m and selecting collapse will collapse only the edges that are connected, merging 2 or more loops in one.
In some ways this is better then removing the loops, since it will also average the position of the new loop.
But I do not think this is a replacement for multiple removal of loops. But it is a good one.
Does anyone have other methods?
Or the uv, are there sollutions to the destruction f the uv?