Legend of Acrius, Vigilance Wing, Sun Shot, Riskrunner, Wardcliff Coil and even the occasional Sturm see fair use in the meta. It's just that MIDA is so easy for everybody to get. I would say the MIDA is overtuned, especially on console where it's a lot more dominating, but I'm glad the rest of the exotics aren't used more than they are. Exotics shouldn't be the top tier, exotics should be very niche weapons that do one thing and do it very well. This is partly the problem with the MIDA, not only is it the easiest exotic to get, it's special ability is that it's very solid in almost every regard, since it isn't niche enough it's going to be hard for bungie to tweak it to the point where it still feels worthwhile but isn't OP. Also, to be honest I'd say Acrius also is a problem (or would be), it's just so stupidly good on some maps, allowing on average 3 kills per ammo drop if you're averge (if you're good there's literally no reason you'd miss and sometimes you'll even get double or tripple kills in one shot). The only reason you don't see it more in the crucible is because there are so many who haven't done the raid enough to get it.