So after trying Blue Moon Bay and Dragon Trail - Seaside I must say I really like both of them. Here's my thoughts on both of them.
Blue Moon Bay:
While I'm not even into oval racing at all this track actually is really fun to drive on. The nice thing about it is that the fastest line is right at the top of the banking. This makes it really challenging, get it exactly right in all 3 corners and you'll be running quick and consistent laptimes. But if you hit the wall just slightly it's actually slower than taking a lower line through the corners. In the only online race I had there so far I saw almost no one taking that highest line, that's why I won there with ease.
Dragon Trail - Seaside:
Very nice track layout with a good combination of quick and slow corners. I especially like those 2 tight Monaco style S corners. With the right line you can go through there quickly without losing too much speed. I think the curbstones are bit too wide though, not just at those corners but for the whole track. As for track side objects/detail it could be a bit better as well, it seemed a bit too empty to me. I think it'll be a lot more fun with some faster cars than in N300 as well.