Dustin ... personally speaking, I'm not a big fan of the "big" bodied plastic Roadrunners. I've used the marabou version for decades, and they've worked well for me. That said, they will catch fish ... but are probably better suited for when the fish are chasing/eating larger sized prey.
I'm just guessing, but I'd think that the minnow users were not moving around much, or if they were ... they were not moving very fast. The prevailing weather pattern has the fish scattered about, deeper than they normally would be this time of year, and probably holding out for a prolonged period of warm & stable weather, so they can finish their spawning attempts. They're doing just that, in the local lakes I've fished in KY.
One thing I do, when the fish are backed off from the spawning shallows (due to cold spells or flip-flop weather), is to use a jig rigged much like a minnow. Basically, I have a 1/16oz jig tied on, with a weight about 8-10" above it ... and I slowly drag that along the depth of the first major drop of the bottom contour. I'll have two poles rigged that way, hold one in each hand, and ease along the normal spawning banks ... only out in the deeper water away from that bank, where the first major change in water depth occurs.
In my case, this just happened a couple of weekends ago. I was fishing Green River Lake, in South Central Ky, and the fish had backed off from the banks due to the drop in daily temps. Using my two pole method, I followed the same proceedure as those dragging minnows, and caught just as many as most of them were. The fish had moved out to the 14' depths, and were hanging just off the bottom.
Any number of baits & methods will catch Crappie ... but, none of them will catch ANY Crappie, unless you put the bait into their strike zone, and at the speed that matches their feeding mood.
... cp