Using cut tree as mulch

We have cut down a lot of trees and shrubs in our landscape after moving in. For now, they are simply piled up in the back 40, and I'm thinking that it will act as a very low maintenance mulch until we are ready to use the wood for stick fuel or hugleculture. I had a pile that had been there previously and was surprised to find that after we had moved away all the logs and remaining sticks, there was a good layer of composted mulch underneath.

In the piles that we do have, I've noticed a lot of grasshoppers (and in turn birds). But I haven't noticed the grasshoppers in my garden that bad. Any advantages/disadvantages I'm not thinking of? I know it won't look that great for a while, but I'm not too concerned about it as it will be just temporary until the wood is used elsewhere. Other option is to haul everything to greenwaste, but I would rather we kept it and used it.

I ended up having a bit of a rabbit problem when I created numerous Chateaus D'Bunny around my orchard by piling up brush an logs. That problem was then solved by finding a good recipe for rabbit.