That is hardly a new situation. When TRS2006 was first released, we were still creating in TRS2004. When TS12 was first released, it took quite a while before native TS12 objects were made....
In terms of T:ANE releases and TS12 releases, that's not the point. If you will notice, a very, very large majority of content produced for this sim is created in TS12. Yes, it might work in T:ANE, but when content creators use TS12 to create new assets, even when they have T:ANE, it is pretty easy to see which they prefer. Most of the recent projects that I cited have been started within the past two or three months, and are not a case of continued development over a long period of time.
In terms of the CG move, it was widely disliked, but I again found myself voicing the concerns of more than a few who did not vocalize the point.
So now T:ANE SP1 is out. It will take some time for the average creator to get up to speed. I created my own procedural track during beta testing, and since the design specs were not well known there was quite a bit of trial and error. But it was a fun learning opportunity.
Meanwhile, please don't presume to speak for me nor include me in the "people" who you refer to. When I have an issue with something, I can voice it myself.