I think that the idea with the Q200 is to be able to loose the JS41 thats sat at NQY on standby. The JS41 currently covers or the -300 when tech and as others have stated will allow for charter work which SZ seem to pick up a bit of.
I would personally be surprised if this is the last expansion we see from SZ, the tie up with T3 should allow them into markets that they dont currently serve, as others have said i would of thought that there are some routes out there to run into NQY/PLH year round, EDI would be one of them and it wouldnt surprise me to see them operate into BOH as stated in the other thread.
CS