I'm probably the same way, but even though I think it's not a good idea, as it smacks of sellout. And it does turn some fans off completely. There were both X-fans and non-X-fans who didn't like Namor being a mutant, much less being in the X-books -- so he lost readers from both groups.
I'm betting young Namor would have something to say about that, but he sure did do a lot of things Betty asked him to. ;P