I assume that wallow means you are running in a following sea? Correct?
What speed are you trying for?
Does the boat slew around , ie. try to turn broadside to the waves coming from behind or on the stern quarter?
I have a 32 ft boat. I slow down to about 5K in any conditions over about 3 or 4 ft. when from behind or on the stern quarter so my travel is definitly less than the waves.
i have travelled in much larger waves, including the big easy going swells but BIG chop. Didn't like it but with a few mods to my handling it became tolerable.
If you are travelling to close to the wave speed or a wee bit faster the boat may tend to perch on the wave peak and then when it comes off and accelerates forward you don't have enough control so the boat slews around and can turn broadside.
WHen the wave speed and the boat speed are to close together the rudder has no real water flow past itself so then very little effect on the boats direction which contributes to the slewing and can make it VERY difficult to correct.
If you are travelling slightly faster than the waves the boat will slide down the wave front and when the bow digs into the wave ahead you have lost most control, the rudder is not very effective and the whole boat may slew around broadside or close and of course tilt.
I learned to slow down so the waves catch me and pass underneath. I am far less likely to have my bow dig into the wave ahead.
On my boat I can adjust the rate of rudder response and turn it to the fastest response, least number of wheel turns for more immediate rudder action.
A few times that still was not enough, maybe I misjudged or the waves were nastier than I realized and the rudder was not enough. THe boat had started to slew around. I then gave the engine a sharp, short burst of power which got me control again, stopped the slewing and straightened the boat up.
So I see from your comments that you have become more comfortable with your vessel which is good.
I almost didn't bother replying but I thought someone else may be looking for advice, thus the result.
Hope it helps someone.