I'm up to 253 which as a lower mid C racer feels about right (between 180 - 350). Using that logic you should be below 350 so the new seeding definitely hasn't helped you, but maybe you had one ride that would have pushed you into B in the old CE world?
In the old world you needed a 3 ride average to get into B, but the new method only used your best performance so is worse for light riders surely?
Also love how they scrapped the 20 mins as it was totally 'wrong', and went with 10 mins and 30 seconds because that's far superior and fully tested and we know we're right as we have PHD brain boxes on it (V1). After 3 months of shoot-shows, they finally accept that their PHD bods may have got it wrong, so dropped the 30 second power, and that's clearly the best way to reseed (V2). Two days later and no, all previous models were clearly wrong and 5 minute power is obviously the way to go (V3)
The problem I see with 5 minute power is it still allows for sandbagging, probably more so than 20 minutes. In a pack, I might be on my absolute limit hanging on and pushing 3.5 w/kg for 5 mins, but others may be cruising, but to their model we look the same. Those cruising, as we all know in races, are not going to push any harder than they need to so they aren't likely to hit their 5 minute max. We'll see though, but we just seem to have gone to roughly where we were previously on the groupings, but promoted climbers like you who have a good 5 minute climb.