just visualizing it through the pictures i've seen everywhere, it seems camber/rocker/camber would benefit on hardpack where you fight to hold an edge at times.
Camber will have the best edgehold. For proof of this look at every race board ever built!
Honestly if you're not catching edges and having issues on your current camber board, and you're never going to ride DEEP powder, why not just stick with a newer camber board? Get something with the right width for you (there are some calcs on this forum to help with that), not wider than you need, and you should have a good time with it.
The new board I've got is camber for the most part, but the nose is lifted for about the front foot. Designed to have lift in deep powder, but not necessary for riding mainly groomers.
The other thing you could do if you're looking for just a cruiser board is buy one with a flat base. It's the middle between both extremes.