How many birds do you have? My system has worked well, I think, but I do not have a large flock. The floor of my coop is also elevated far off the ground -- there is a run underneath it with a ladder for access.
I have used pine shavings since they were in the coop, and I like pine shavings because they do a great job keeping the environment very dry. I have about 1" - 2" deep shavings the floor of the coop, and every morning, when the girls go out to the run, I put on a glove and just grab up all the poop I find in the coop and throw it in the composter. It takes two minutes at the most, but I definitely am committed to doing it it daily. Then every few days I will add a handful or two more pine shavings if the bedding looks thin. Maybe once every six months I might get rid of all the shavings and put in a new layer, but it never really seems necessary even when I do it -- everything is always very clean and dry. That's it -- even though I don't change the shavings, it's not deep litter because there isn't really any organic matter in there breaking down. It's just keeping the pine shavings scooped and occasionally replacing. So that has worked for me, but that's just me.
I have sand in a covered part of my run, which I like, but it is REALLY heavy. For me it would be hard to use in the coop.
To me your plan to start with a layer of pine shavings sounds good, actually. oldhenlikesdogs is right that it should be thicker in winter and thinner in summer.