Ed has talked about how next year will be a great draft for PG's. Sort of a strange statement considering it takes a few years to develop a PG, and we probably need a starting quality PG in the next 6-12 months.
I'd be fine extending Miller 2 years (or a 3-4 year declining deal) but I doubt he will be a Sixer past next year. I'd actually be surprised if he makes it to the deadline.
I would be willing to put Lou in a platoon type situation like Toronto had. The Sixers have depth, and I could see them going 10 deep and playing trap/pressure defense all game, which would open up time for 2 PG's, especially if they were versatile players like Crit, Hinrich or Lou.
I can't imagine them throwing Lou the keys, but bringing in another young complementary PG/SG to share his duties would be a good way to see if Lou can grow into the pg position. He will never be a "pure point' -whatever that is, but might grow into a good fit for the Sixers at PG depending on who else is on the roster. There have been many great teams who run their offense through several primary ball handlers without a pure PG. I just don't know if that will work for the Sixers and Lou.