You do realise how much work that entails? The art team would have to make brand new models for each of the new ships, every year. Plus all the other ships they are having to do for R&D. And all the other misc stuff they have to do to help make SWC prettier. A couple of years is fine, especially once R&D comes with new ships for people to get.
Myself being a fledgling computer artist, I am totally amazed at all the things our art team has done. It is equally impressive knowing that they work for nothing except the enjoyment of their audience. However, I agree with Jonas in that the less expensive ships get switched out every year while more expensive ones such as the Namana stay a while longer. To make things easier on the administration, what they could do is to implement some earlier CP ships not currently in the cycle as well as new designs. Just a suggestion on my part.
I wouldn't mind knowing a time frame for switches. I.E. if there's about to be one post like a month before the new ships come. Other then that it can be however long they'd like. I'd like R&D before new CP ships. It interests me far more. That and by not letting people know it allows people to sell ETA-2's for around a mil and YT-1760 for about 4.2 saying that they'll be gone soon. I won't pay that but for some reason there are a few people.
That and R&D would help the economy more then new CP ships.
No, hence the Rare tag. As for getting one, get a spare couple of hundred million credits + and go ask around to find someone. I think there are only a few though and their owners are unlikely to part with one.