Maybe it is just me, but surely you find it easier to "nominate" an initial rate of descent once the glideslope has been intercepted and thereafter to make adjustments to descent rate in order to maintain the slope , rather than simply charging up and down the sky hoping to recapture it?
Obviously one doesn't just "charge up and down the sky hoping...".
At the GS intercept, I drop the gear and select 1st stage flap. This gives me very close to the required -VS. And the aircraft remains trimmed as it was before. This is IMHO better than trimming in a hurry at the GS intercept.
I am sure others have different methods.