Your Run looks great, what's wrong with it? Ours is a Nasty Muddy Mess from one end too the other.

You asked a very popular question, what may work for one person really good don't work too well for another. Each condition is different and it seems to be an on going issue, limited space and over population don't help either.
If a person uses a material that is to sharp and or hard for their soft feet, then you start having issues with Bumblefoot and that's no fun to treat. A deep litter of straw and hay is fine for a little while as long as you can keep it dry. When it gets wet it's like a sponge and now you really have a big nasty smelly mess to work with.
I wish I knew of a secret method or trick to help but I don't, sorry.

Best of luck.