Uhmm err, I don't really like judging someone's skill but since you asked for it then sure.
Playable terrain:
Base on the terrain I saw on Scarlet Crusade and some of the stuffs available on your album. You're really into using HQ models that really boost the appearance of your terrain and that is enough to make the jaw drop of some random passerby but since I'm also fellow playable terrainer, it doesn't really wow me like the other people, I'm not saying you're bad on it but it just that you haven't pulled of something really spectacular. You're more the guy that just know what to do here and there and then take advantage of HQ assets. Learning a few more tricks will really make you improve by a lot. 6/10.
Scenic Terrain:
Well I think this is the field where you really shines. I dunno how you can pull of structures like this on a scenic art but can't pull it off for a playable terrain. Anyway, I really haven't follow your progress on making scenic art so I can't tell much. But base on the work of yours that I linked. Maybe around 8.
Welp, there you have it.