Personally, I have no problem with the Egis as they are. I like the idea that SMNs are able to harness and control a tiny piece of a greater whole, and I think that it's awesome that they went through the effort of actually went through the effort of making this "piece of power" have a look distinct from the main Primal. Titan-egi, in particular has a really neat design with all the orbiting chunks of rock. Garuda-egi, I'm a bit less pleased with.

If they did make the Egis look like the Primals, I'd really appreciate it if Ifrit and Titan didn't FLOAT. One of my biggest beefs with FFXI SMNs was that many of the Avatars looked ridiculous floating behind the SMN; a bit like baloon floats. Ifrit was the worst offender in this regard, but Ramuh was pretty bad, too. Titan can walk, why can't they? Leviathan looked pretty bad as well, curled up into a little coil and hovering, rather than swimming through the air. Floating works well with the Egi design, but it would look pretty bad with the Primal design.