Strip it down, the DA7 in a Protools environment gives you this -
Tracking -
16 preamp inputs (8 XLR w phantom, 8 TRS) with EQ/Compression on each that can be used pre/post
Mixing -
Well, you could assign your I/O from Protools to the DA7 and mix on up to 24 channels but I think this is an old school way to go and undesireable for most DAW people. If you really like the EQ/Compression on the DA7 you could easily route it through a channel and bounce back to a Protools track.
Inserts/Outputs/Talkback -
ya gotta have I/O for your speakers/headphones/outboard recorders processors etc. The DA7 has 2 sets of analog outs and 1 Digital out. A passive volume control box like the one I have by NHT or something with more I/O like the Presonus Central Station would do the same.
Midi Fader DAW Control
You can assign 8 faders to Protools faders in HUI mode. I use this very rarely.
Impress clients with lights and faders
Take up space in your room.
If the current street value of a DA7 is about $1000 - it's still a great value for the number of preamps you get. It's also a great mixer for a live PA or club.