I won't be that concerned with latency as the delay is actually barely noticeable. I compared both direct mic source on Ch1 of my camera input, and split the signal to the RodeLink/System10 on Ch2, and it's probably less than 1 frame delay.
The biggest issue with 2.4ghz band is the channel limitations. You're only getting about 8 channels in a single operating venue, and that 8 channels of the Wifi band have to be shared amongst all the other wifi users, so in a typical conference venue, you're probably limited to say maybe 50% of the bandwidth available for good audio data transmission. If 3 other videographers happen to use similar 2.4ghz band for their wireless mics, another videographer uses 2.4ghz for live streaming, etc.... it's highly likely that you'd start to get signal drop outs in your audio link.
When all else fails, just use the good old wired solution.