All this stuff will become too crowded. Dwarf Burford is not necessarily small. (I've used them for small trees.) Dwarf Yaupon Holly might make an OK replacement for the spruce as you can cut it slightly taller than the stoop without too much trouble.

The perennials in the front are easy enough to move/divide if it gets too crowded, and I plan on pruning the burfords on a regular basis. The bed is actually pretty deep (maybe a bad perspective). I guess I could replace it with another thin conifer but would the mites be an issue again?

I would put a camellia there, or another double red knockout rose.

I like the idea of the Yuletide, or other Camellia that will work.