it is a combination of both. But for sure, tracks in LFS "made recently" are very beautiful, at least it is fine with me !
I find AC having a lot more beautiful cars (loading time is impacted ^^ ), top interiors, etc ... Having such in LFS would be simply awsome, I agree !
To answer the initial question, seeing the efforts done in LFS recently by the devs, I think it is really worth the money spent (even if for now, only one environment is available). You subscribed almost 10 years ago and still play the game ... are the game developers deserving £12 more ? For me, there was no doubt. I am pretty sure I will play LFS for a very long time to come anyway whatever the other games companies will do.