Unnecessary high throttle in Feb and cruise

Hello, I’m having trouble with my mini talon and alt gold type modes. In manual i can fly level at 35mph, fbwa i can hold altitude at 41% throttle and 38mph airspeed.(maybe a level pitch issue?) This roughly 4.3amps on my 4s setup. I can do this all day long.

When I switch to both down and cruise, the throttle jumps around a ton, mostly in the high 40 and 50% ranges, and 8 amps. The is no reason for such large jumps in throttle and all over the place.

I was thinking maybe the pitch excel isn’t quite level, as well as perhaps a bit nose heavy? Throughts?