I suggest having a complete alchemy path for the Vitasuit. I think it is pretty silly to have a perfectly good armor like that rendered completely useless due to an incomplete alchemy path. It is unpractical to go building a cobalt set just to build a Vitasuit that stops at 4*.
Similar complaints can be used against, Cautery sword, winmillion, swiftstrike buckler, heavy deconstructor, scarlet shield, frost/ember/circuit break lines, and the rare darkfang shield.....