It's not so much specifically him as that it's an example of how the whole idea of "First-Anyone" is off-putting to me.
And as I said as the start, this story is being written by the same writer(s?) who did the DRK questline, who already brought back "not-Haurchefant" to play for drama in a way that I found incredibly disappointing. Even before this announcement, it made me apprehensive about how the story might turn out and whether I would be similarly annoyed by how they handle the plot.
So no, it hasn't happened yet but I wouldn't be surprised if it did, and thus am getting at least some of the frustration out of the way now. Hopefully I will be pleasantly surprised that it doesn't happen.
This just makes the "alternate selves" thing even more depressing.
This is why I don't want alternate versions of characters. Not from this setup with 12,000 years of independent evolution and "butterfly effect" changes in the world. People aren't produced by independent random chance each time, they're the product of all their ancestors. It's not a dice roll that has the same chance to produce a result regardless of what has gone before it.
If they are different people living different lives to their Source-counterparts ... what about their parents? Their grandparents? Great-great-great-great grandparents? That's up to 128 people on just that line of the individual's family tree, and we've only counted back maybe two hundred years. And the further back you go, the more a single "disruption" to the chain is going to affect multiple people's ancestors, with a flow-on effect.
Did all of those 128 people live "different lives" to their counterparts, and yet all choose to have children with the same people?
And the next generation, where another 64 individuals all made the same choices?
And another 32?
And another sixteen? And eight? And four? And two?
None of them died as a child? Fell in love with someone else? Never married? Stayed home on the day they would have had a chance meeting with their future partner?
That's seven generations and 254 people who had to follow the same path in two worlds, just for a single person to be genetically the same as their counterpart. (And we're probably dealing with something more like four hundred generations, assuming three or four per century.)
It's improbable, and inconsistent with the base worldbuilding proposition that the worlds have been evolving independently since the split - and they clearly have been.
If the worlds are independent and different, the people should be completely differerent at this point.
If they want everyone to have a First-counterpart, the worlds should be far more similiar (and the split less distant) to seem at all believable.
And once someone isn't the same person either personality-wise or genetically... it's not them, it's just a chance lookalike. We could just as easily encounter one on the Source.
(Edit to add: from what we know of naming conventions on the First, they won't have the same names as their counterparts either.)
That could get... interesting. Have fun untangling that time-space-dimensional-travelmajig.
Though we did get brief flashes of both Mide and G'raha during one of the Omega cutscenes...