Honestly, no. While I do think it would be interesting to see what they could possibly look like... wait, no, I don't even think that; they wouldn't even resemble Eevee most likely, not that it has to be restricted like that.
Anyway, in theory, it wouldn't be very good, especially when Eevee itself already has so many evolution options. Its evolution is more for adaptability than to get stronger or grow up, and with most Eeveelutions being human-raised, Evolving out of necessity anymore isn't that widespread.
Oh man, that's a mouthful. :x Hope I didn't lose anyone; I prolly won't be able to explain what I'm talking about anyways.
But, if there is one evolution type for Eevee I want to see, it's the Normal type. Eeveon. It's something I've thought about for YEARS, and probably the only eeveelution idea I've been able to visualize, if only slightly. I suppose such an evolution would consist of "growing up" thanks to contstant human contact and not needing to evolve and adapt to any specific environment.
If I say anymore and people wouldn't read this, it'll be so long. xP