Not much right now.
Of what's available, I'd of course pick the highest disc(s) -- if it's getting passed along from another user, you'll get it no matter where it is... Anyone that doesn't want that can let me know, and I'll try to make sure it's how you want.
Many options I'm considering -- to set whether you care about Queue order (how strongly...?), or just want anything equally (I remember Blockbuster had this option; don't recall seeing it with Netflix).
What to do about unavailable discs -- skip them, or wait for them and block others. What does need to happen for sure, and doesn't yet, is movies from a series that are related should be "locked together," in order, by default, unless you choose to break them apart and allow them to be sent independently.
An option to only consider discs in the top N
positions (customizable, of course) -- e.g. have a single digit number to really control the few you want to get (at the expense of being passed over for others, of course; longer waits; etc.), or set to like 50 if you have tons and don't want to get something from way
Of course this all needs to be considered in some sort of "scoring" system to progmatically decide what to send where, when...
Dunno! It's basically "dumb" right now, haha.
P.S. 3 of them are now available that didn't show when you added them.