WTG, NoRacer!
You were right about "more hills, more intervals." If you stayed to watch the A's and B's, those races got strung out pretty bad because both of them had a lot of attacking on the hill.
And if you have it in your legs, you'd be amazed how much time you can put into the pack in the turn. A couple times I got on the front and went through without braking and I had to sit up and wait for the pack to catch up. If you attack while people are resting at the top of the hill, haul a$$ down the descent, and go no-brakes in the corner, you can open up a decent gap.