Consider thinking of the whole lane as 3 separate parts. Heads, mid-lane and back-ends. For each bowler, based on style and abilities, each of the 3 areas will have a length and width that the bowler must match up their skid, hook and roll phases to.
Carry-down simply elongates the hook phase length and shortens the roll phase length. The result are shots that may recover but recover too late.
Going to a more aggressive cover stock may get a ball to recover better but the ball is still going to recover too late. Unless a bowler has lots of rev's, they'll hit the pocket but leave lot's of soft 10's.
I'd recommend drilling their ball different. I'd drill their ball to skid less and transition to hook sooner to shorten the hook phase length giving the ball more time to roll before contact with the pins.
Here's a personal example. I have 2 Storm 'Locks'. One is drilled 50 x 5 x 50 and one is drilled 45 x 4 x 35.
The first ball works fine on a wet dry pattern in early games but slowly as lanes change, the hook phase gets longer and the ball begins to recover too late. I'm still hitting the pocket, I'm just not carrying those hits. By switching to the other ball, the hook phase gets shortened and the ball finishes earlier eliminating all the week 10's.
Both balls have the same cover and cores. It's the drilling that corrects the problem, not the surface. The idea is too get more of the ball in contact with the lane on each subsequent flare circle.
I'm not saying a more aggressive surface won't work, but if the ball is drilled the same as a ball that won't finish soon enough, the bowler will still be face with a drilling that wants to finish too late. Ball surface can make a ball break harder, but if the ball is already too far down lane, the entry angle will be too wide and the result will be less than desired.