2 more votes for this feature as well. Only yesterday I was discussing this a colleague who could really use this feature and I've found myself in the same situation.

I don't mind repatching if the channel count is different.

Gentlemen,

It's your lucky day! Fixtures are easily replaced by dragging and drop another fixture on top of the fixture you wish to replace. If you want to replace more than one at a go - select them all first, then drop the replacement fixture on any of them!

Just want I wanted to hear. My colleague is going to very happy when he see this :D