The Deimos is already pretty high quality for a model these days, so it shouldn't need a revamp.
The Thanatos and Zephyr are still pretty good, but I'll admit that they could use some love, but are overall still good models.
The Argus.. ugh... here we go..
The Argus is literally a temporary model. It was added to the CR capline because CR didn't have a BC to contend with the GRN, but the only model available was an ancient IMG BC model. @=Hellfire= was working on a model in the past, and iirc got it finished and submitted it to the devs, but it was denied by the devs at the time for.. unknown reasons, which is strange because it kept consistency with the Deimos and was an absolutely gorgeous model. I still say that his model would make the Argus so much more pleasing to fly, and without the stupid little grin it has on the front.
tl;dr
The Argus is the only thing wrong here, really. Everything else is still as good as the day it came in.