This was designed by the partner, contract signed by us, the whole solution paid by us, without consulting any network engineer on our side until 1 week before it was supposed to be implemented. We proposed two different solutions that would cost less than 1/20 of the cost their solution was costing us ($20k/month), while providing real redundancy (yet to be implemented, though some SPOFs solved by now). Never enjoyed outages as much as this as we got to explain why their solution was so bad each time.
The third party consulting firm are long gone, as are the people high up in the company who brought them in.
Now there's new people high up who come up with the same problems, but in a slightly different way, arguing how their basket is far better than the previous basket.
Sigh.
However I know reality and contracts never meet, unfortunately in a large disfunctional organization there are other considerations in circuit procurement than technical requirements.
As for internet circuits, I had two ISPs in NY on two separate paths, which is great. Something went wrong about a month ago, and the routing from one of the ISPs changed, meaning that we were back to a single point of failure who we have no business relationship with