Hi P&P - I too have a raised coop with a wire floor. The small rectangular holes (I think it's called hardware cloth - the kind hutches are made with?) It works great in our hot humid tons of rain environment. So far I don't have a problem with odor. The poop doesn't fall through the holes as well I thought it would since the holes are too small so I use the hose with a presser nozzel on it and once a week I BLAST the stuff through the holes and onto the ground two feet below. The ground is covered in a thick layer of natural mulch from the overhanging oak and pine trees plus I throw pine shavings down there every once in a while. The only I time I have odor in my coop is when the piles of poop have started building up again. By blasting it, it tends to dissentegrate. What lands on the ground gets scratched up and around the run by the chicks since they tend to hang out under the coop in the shade a lot. I don't have a problem with smell from the ground or with moisture because once the sun comes out at 100 degrees it dries up everything. So far I have not had to rake out under the coop because the chicks do that for me. So instead of raking, scraping and shoveling - try blasting it to smithereens with a water hose nozzel set on high pressure. Nothing left to worry about then.
As far as the wire being hard on their feet - the Chick-N-Hutch I bought and started them all in had the same type of bottom and that was what we used when we built our own. Our girls free range all day from morning till night and the only time they are in the coop is to get on the roost to sleep or to get in a nest box (which is floored) to lay and egg. However the wire works great for us because it provides ventilation and when it's really hot here the chicks will get in their coop, on their roosts, because it is raised and vaulted and ventilated so it stays cooler than outside. I haven't been through winter yet with chicks but have decided that I could cut a piece of plywood to cover wire bottom for winter IF we ever get an acutal freezing night (rare) and/or I could lay hay in the bottom for winter - like I do in the Chick-N-Hutch for any babies (so their feet don't fall through).