You're right, P88 is clearly mislabeled as a 6. Last I lined it up next to P92-Lie 5's, it was actually even lower than that.
P46 is a very nice curve. It's an E4, with the toe gradually rockered up to make for more puck-ice-blade contact on toe-fling shots, then with a P92ish curve with a touch more toe. If you line up the P46 and E4 blade faces, it's easy to recognize the shape, just with the material around the toe shaved down a bit.
P.S. Warrior Smyth (rumored to be Kovalchuk's legal pattern from the early 2000's) is similar: E4 with a more concentrated toe shave for puck-ice-blade contact on shots, and then that curve which resembles a Sher-Wood Coffey.
Forever I was stuck on low lies, so I got to be really picky about these geometric subtleties. I've started to be able to handle a broader range, but haven't ventured as high as the P92 yet.