It just depends on how much flexibility you want in your routing. I like being able to send 4 voices to (potentially) 4 different tracks in the Octatrack. I think it is definitely meant for more noisy operations, but I don’t think I’d fall in that category and it still is quite pleasing.
With a Mackie, I sometimes felt frustrated having only 2 aux sends. The primary drawback to the matrix mixer is the lack of EQ, pan, and mutes (which might be addressed depending on how you set up the OT). It just boils down to what utility you feel like you ‘need’ within your setup. It’s definitely limiting in some ways, but ah, the simplicity is a wonderful thing sometimes