Sounds like the Lazy 8s are okay. Just hit the recommended bank and pitch settings at the 45, 90, 135, and 180 points and everything should work out well. The last 45* of my Lazy 8s are also a very shallow turn/bank and descent. I haven't been corrected so I'm guessing it's all good.
With the steep turns, I agree that it's a sight issue. I had the same problem. Like stated earlier, find a point on the wind screen (bug or make a mark yourself with a grease pencil) and keep it on the horizon when entering the bank.
I'm also doing my CFI in a 200 hp Arrow and I never drop the RPM below 2400. MP obviously varies so just play around with it until you get it to do what you want.
Passed the FIA this morning, oral is Wednesday, flight is next Monday!