That's fine, and many people prefer to work the way you do. However I and many prefer to use a digital mixer for routing, hardware controls to work with, and the easy work flow of everything done on one unit. There is no right or wrong way, but you have to decide which way works best for you.
I thought about working your way, however in getting the new Apogee 16 A/D D/A converters, a mackie controller with expander, an analog mixer for routing... it just got too costly and too many wires routed all over the place. For what the Yamaha digital mixers and others offer for their price and sound it works pretty good for me. Prehaps if I had a pro studio, and clients rolling in, I would take a different approach. But as it is, I can only work in my studio after my day job, and when my kids are in bed.
I am just interested in those who use digital mixers and how they use them in their studios. I am trying to see how others use their digital mixer and if they have a more efficient way of using it over my config. Most people use outside mic pre's for vocals and acoustic guitars. But for electric guitars, bass, drums and keyboards the DM 1000, 02R96 and DM 2000 are quite respectable.