I've not wanted to get my hopes up here, but it's seemed quite obvious to be prime opportunity for Dubas (and his family) since the start.
It makes too much sense to hire someone who has a track record, good or bad - especially if they're coming in wishing to prove themselves. Re-treads don't often work as the most they do is try to get 'their guy' to put a flavor on things but have some sort of record to rest on. Dubas is young (positive), leaving a toxic situation (chip on shoulder), is family oriented (welcome to Pennsylvania brother), bold (positive in this situation), and has had some hard lessons in recent years in high vis situation (I view this positive). Lightning in a bottle possibility here.
I've seen professionally where certain individuals rise quite fast, only to run into several bumps. There have been those in that situation who falter, and those that take a step back and shift gears. I think Dubas should take the job, if only to stave off any imposter syndrome he might feel. I think the responsibility of FSG is to be extraordinarily supportive of him and his family, while also creating clear goals that he can work to achieve. With that, you could have yourself a fine employee.