loose some of their meat eating consumers? if an omni is open minded enough to eat faux meat, I don't think they would notice that there is no eggs in the product....and I don't think a vegetarian would look at the package and say, "oh they are now vegan in lieu of vegetarian. This must taste aweful."
Vegan/vegetarian products are hit and miss anyway. And I think a vegetarian or anyone trying a faux meat product is open minded enough to try a vegan product. They will probably already have product loyalty towards morning-star and are willing to try it.
and I'm not sure how much the eggs/milk effects the taste of their products, I've eaten a lot of vegan faux meat that has tasted wonderful. I think just about every ingredient can be replaced without effecting the taste (to a certain degree for some things).
For example, I prefer cookies with egg replacer than how I remember "regular" cookies tasting.
I think it depends on the cook, I think they could make tasty faux meats without egg/milk, after all a number of other companies have already done so.