I totally understand the benefits of this fully integrated approach, especially at scale with the low cost of 10g internet from Sonic. I will at the same time throw my hat into the ring, I would love a kind of SFP+ option where I could run the fiber directly to my router using some known SFP+ transceiver, even if its one I have to purchase (with a setup fee) from Sonic. I would expect it would become "User owned and serviced" equipment at that point too. I also totally understand that wouldn't be ideal from Sonic's end either. But hey, hat in the ring, that's all.
As for benefits, I don't have a lot of outlets and do a lot of power management/backup on my small home rack, so one less device sounds good to me. So its just simplification on my end... at the expense of complication on Sonic's end (albeit a lot more complication for Sonic and simplification for me).