This is ridiculous.
The only player agency you have is the agency they give you - it's their game, and they set the limitations on what can be done inside it.
If you change or modify the game in any way, that's not their problem and they are under absolutely no obligation to support it. Period.
If you use mods, that's the risk you're taking.
I never said they had to support it. I said they have to consider it. Two different things.
And I don't deny it's their game or that they can't do what the hell they want with it. I say that this particular decision is a bad one in my opinion. If they for example decided to not release DAI on PC/PS4 and make it a XBone exclusive, it's their right. They don't have to support PC or PS4. Doesn't change the fact that a lot of people would be unhappy about it.
The same logic applies to my initial point:
BioWare CAN make the cameo appearance of Hawke work. They possibly can correctly approximate the characters behaviour to satisfyingly simulate the behaviour a player had had in DAII and everyone will be happy.
They can also make it not work and people will feel alienated from a character that was previously under their own agency.
THAT is the potential issue. BioWare took a PC character, and made it an NPC.
Granted, if Hawke's cameo is purely cosmetic, like say a vision/dream/whatever that doesn't interact with the world and your DAI characters past a few lines of predetermined dialog, then all they have to do is properly transfer the appearance and mark the correct checkbox for either male or female voice, done, bingo. I'd be okay with that actually. Hawke wouldn't do anything potentionally uncharacteristic to how I roleplayed him/her. No defining interaction dictated.
In short:
Cosmetic cameo? Okay.
Interactive NPC? No. Bad idea imho.