your logic is truely mind blowing! lol. your assesment of power doesn't work exactly as you imply. Simply having the power on tap doesn't mean every rider can use it, and over a 2hour woods race someone on a much more rideable 250four stroke might have more energy at the end than a similar caliber rider on the more powerfull (but less power down low) 250twostroke, or a 450four stroke. Not in every case of course..It isn't about max hp to get up a hill .. its about crossing the finish line ahead of anyone your racing with. There are lots of ways to do that. Obviously there is no "perfect" bike or everyone would get THAT bike, im sure you see and talk with riders that love the 2stroke, and as many that love a 4stroke. AA rider Kyle McAfee is consistantly top 5 and was on a kx250four stroke! he doesn't use an auto clutch, nor does he like bark busters! He is now on a ktm350four stroke and loves that bike.
The set up of any riders weapon can mean the difference in finishing 1st or 5th.. Suspension is key, but so is a reliable and rideable motor.. one advantage a 4stroke has in woods is fuel consumption and the smooth power (you knew that already..i know). due to the good low end grunt of the crf450, you are often at low throttle positions. But get an open field section? and the 2stroke won't have a prayer if geared right.. the
RECLUSE allows lower gear ratios! (you don't have to go from the stock 48 to a 50 to not stall in the tight stuff!) you can keep the stock 48 or even go down to a 47 (for our courses down here in FL) and have a missle in the open filed section driving right by the 2stroke that is "ring-a-ding-dinging" topped out.
I don't know what riders you know that are having problems..
but the riders that are breaking auto clutches and parts within, do so because they think they can just put it in a tall gear an ride everything in that one high gear. Result? the clutch gets superheated, warps metals, cracks fibers, and wears hubs and pressure plates as they are spinning WAY faster than they should be. Ride an auto clutch like you would without the auto clutch (in the right gear all the time) and even the lower cost EXP that removes fibers can work for many riders. I know SOME good riders that don't like em, but know as many or more good riders that won't race without (myself included). It isn't because the technology isn't good enough, or there aren't enough choices.. Dyna ring had been around for years, they are no more (have no idea why not) so Recluse is the only game in town but the product WORKS if you don't abuse it and expect it to do more than it's designed to do. But what do i know, im only leading the poits after 9 rounds in A class with the CHEAPEST exp recluse on a crf450r..

Not only is my clutch in perfect condition, the fibers are still in spec after 50 hours on the meter since installed. Rotella synth oil changed in the trans every 5-8hrs depending on when it gets nasty looking. Yes, it does get nasty a bit sooner with the auto clutch but that was to be expected.
One critical aspect of the auto clutch is set up.. if someone doesn't take the time to get the right engagement set up they might not like it (as you have found).
And some riders simply do not like an auto clutch! That goes for C class and AA riders! different strokes for different folks.. Just keep in mind the exp2.0 and CORE is very adjustable. There are 6 tiny springs in the ring, those are highly adjustable depending on what combo of the 6 you use. Then the 6 wedges can be replaced with heavier ones than stock if you want a faster engagement.. The expCORE requires that, as well as adjustment at the pressure plate so not as easy, but you get a true stock feel clutch with free play at the lever..
So while i appreciate you likley have the skill and woods experience to make some good assessments (although you will find a massive difference in speed from the b class to the a class), without having one i wouldn't go passing as much judgement as you are. After all, if not satisfied recluse will take the thing back for a FULL refund..