I've got the Wilson/Scattergun Tech oversize on my 870. And I've used safeties behind the trigger in the field hunting since I was a very young teenager (an Ithaca 37 has the safety in the same place and that's what I used when I was a kid). But in truth Benelli's safety location in front of the trigger guard makes more sense and the Mossberg safety on the back of the receiver (along with the location of the slide release on Mossbergs) is so intuitive it makes the operation of the gun very natural with the only drawback being if you use a pistol grip.
But I agree about oversize safeties. Hell, look at the entire 1911 world with all kinds of oversize safeties...
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