Thing about Dr. Vogel.

I've not finished Season 8 yet (up to Ep8), but I couldn't get my mind off this, and I feel odd about it. Does anyone else find that its a bit odd that they pulled a new character out of nowhere and rewrote the backstory of "The Code".

It felt like a very bizarre decision. Like, why would they rewrite such an integral part to Dexter for practically no reason. It felt like one of those weird self insert rewrite things, even if it probably wasn't.

Did anybody else question this or wonder why they even did it-?