Here's what I think, and mind you this is only an opinion, and its mine. I have a two piece cover, its been posted on here a number of times and works like a dream, doesn't leak would make clutch change easy. OK, so I said would make clutch changing easy, but to be honest, I have never had to change a clutch in the field. i do the maintenance in the garage and hopefully won't have to in the field. I have a couple of pretty healthy running 500's one on Nitrous (actually I'm not using the one on Nitrous anymore but did for years) hillclimbing, this is a sport that is hard on clutches. so I guess what I'm saying, is other than the bling factor, the absolute need I don't think is there. If they could be produced reasonably inexpensively then yeah it would be a good deal. I have a ton of hours in mine, so unless you can find a cover that is off the shelf, like the 450 cover and build a ring like Sandblaster is going for, I think it will end up cost prohibitive.
If this all comes to fruition then I may be up for one as well, but for now I'm going to adopt the wait and see approach and hope something works out