hmm...
I prefer simpler rigs, and, as I said the other day, there are many ways to solve the glueing to world space for no sliding feet...(I liked your tut link of the other day, but I think I said already more than once..

)
I tend to prefer less complex, and in some parts,less IK based rigs.
But this is a personal preference, only.
I'll give for sure a read on what it may mention on realistic rendering
