I don't know about HRC but I think my yz is bulky. I have the cycra shrouds and it is a little better but it should be thinner by far. The yamaha would be easier to turn in tight spots and ruts if your leg wouldn't have to stick out so far to the side. If JGR develops new thin shrouds I hope the put them up for sale. Just to test my theory I removed the shrouds totally and made a few easy laps and the bike was much more comfortable and I could tuck my knee in better and get the bike to lay over with less effort.
I agree 100%, the cycra shrouds did help and are better than stock but it would be nicer if they were even thinner..