That looks like a reasonable start to me, and is similar to what I concluded a while back. I'd assumed that the mountain range west of Aleroth became the coastline during the chaos after the time of DD, although I'm slightly questioning that as the Orobas Fjords seem like they're probably older than that. But it is similar to my own assumptions from a few months back:
![[Linked Image]](http://vometia.com/images/divinity/rivellon_map_vom.jpg)
Luculla might be a bit of a stretch and it may be nowhere in the vicinity, I was just hazarding a guess...