Sounds like not quite enough elevator throw and/or rearward enough CG.

When you have enough throw and proper CG, one or two clicks too much throttle will be your Harrier, three or four clicks too much throttle will be a slow inside tumble/flop.

Spoilerons will help stop the wing rock...To avoid over-correcting the occasional rocking, I also flip to low rate aileron when I'm coming all the way down to the ground.