This is great input, Terretta. Exactly the kind of thinking I wanted to tap into.

Some quick thoughts in response:

For #1, the conceptual test included reading and writing in a 1:1 R:W ratio (well, to be more accurate 1:1 R:U). I like the idea of extending this a little bit to include C and D. For the sake of benchmark run-time, I'm looking to restrain the growth of permutations. But on the other hand, I like your idea of a tunable ratio. Something to think about!

I like #2 and #3 as well. I'll think about those some more too.

I really like the idea of incorporating some bcrypt and session state (#4).

We have a few caching tests in mind, but like elsewhere, we'll start out simple and then add complexity.

Thanks for the great input! This planning is to have some good long-term ideas in mind.