Don't necessarily think of a rig as just a pop-up or bottom bait rig, although the Ronnie rig is pretty much pop-up only.
I have used both the D-rig and Multi rig with bottom baits. My standard 'bottom' bait rig can be used as a pop-up rig, just by using a shorter hair, tying the bait tight to the rig ring, and adding a pop-up weight.
I can use the same D-rig, Multi rig or bottom bait rig for snowman baits.
On heavily stocked lakes it may be that there are not enough freebies around your hookbait, that could be pellets or particles, or groundbait. With a pop-up it could be that fish are wary of picking a bait that is 2inches off the lakebed. A single or double may recognise its not nailed down. A 20 or 30 may not.
The kicker may or may not be the problem, there can be a difference from water to water, area to area on hooking fish.
On one water I fished a standard knotless knotted rig failed to hook fish. I had to add a proper line aligner to hook them.
Just lengthening the tubing on a straight shank can create better hookholds, a bent or curved kicker is not always necessary.