Ive got the same plane with a zdz 50 ng. what are your low rate elevator setiings? anything more than 12- 15 degrees ( about 3/4-7/8 defelction measured at the front edge of the stab/elevator counterbalance) will be too pitch sensitive for landing. My settings are 15/low-20% expo and 40/high with 70% expo (JR 8103) and I have to be light on the stick when landing. I fly with my c/g @ 4-1/2, I have moved it back several times and it doesn't help the aerobatics but does make the tail drop a bit on landings. There are several posts on here about the c/g and almost all agree that the recommended 6" is too much and 4/34 -5 is the max. At 4-1/2 mine only takes a slight nudge on the stick to maintain inverted, At 5 it would fly inverted with no input on the elevator but felt ---for lack of a better term-----"wallowy" every where else, and like yours seemed "pitchy" Make sure your ailerones aren't "drooped" slightly. That would give you some added lift that you don't need. Make sure that you don't have some funky mixes going on in your radio that might be giving some unwanted surface inputs. Check the centering of your elevator servos. Other than that, i am out of ideas for the moment.
let us know

zonk