I like tracks just a little on the large side, keeps me interested longer with more corners, well that is as long as it is a technical track that
has corners....
I'd ask a few of the top lads thier opinion,
but then make sure it is raceable even by the people in heat one, I think that's where a lot of tracks go wrong IMHO.
My suggestions:
Keep technical, twisty, bumpy, (difficult) jumpy bits close to the rostrum and central.
Include some nice height changes if possible.
Have a good mix of corners (not all 90 or 180 degree, some nice sweepers, multi apex corners etc).
Make any feature you create usable from multiple directions to increase the number of layouts possible.
G