You wil be fine. Even fully maxing a squadmate with 400 crystals during the build only gives an extra 665 points to each stat (which is just icing on the cake for an Epic with 13,000+ stats), so its not game breaking to have uncrystalized characters. In fact, a lot of players dont even have Perfect Evo versions, so yours are probably better than most.
As you work towards the top ranks, crystalizing yoru squadmates will become more important, but right now I wouldnt worry about it too much. Especially with all the great buffers you can get for Attack, Defense, and Agility, it's easy to make up for any weak points.