I've never had my Manix 2 apart, but I am pretty sure that what you're saying is correct. I don't think that a regrind to seat the blade tip farther in is an option with that design.
I understand that some could say that I'm making a mountain out of a molehill, or that this isn't really a big deal, or that it would be a really long time before this became an issue. Honestly, I sort of agree, but it still kind of bugs me that this seems like it could be much more of an issue with essentially my favorite Spyderco knife than it is for many others.
It made me take a look at other knives to study their propensity for early retirement due to oversharpening. For example, my Manix 2 XL doesn't have this issue, and even my Dragonfly 2 doesn't. My Benchmade 555 doesn't, either. Those knives look like you could sharpen them for many years before this came to be near an issue. So, when I look at the Manix 2, it occurs to me that simply extending the tip of the blade without making it any broader (where contact with the spacers would become an issue) would resolve this and result merely in a slightly more gradual curve to the blade's belly.
I really wish that Spyderco would consider doing that on future production of this knife. Why not give it that much greater of a lifespan? I mean, the knife is already, in every other respect, one that owners can feel likely to be able to hand down to a future generation.
"Within this frame an ocean swells -- behind the smile -- I know it well..."