This seems way beyond the scope of the games they've done. I haven't played Hades, but Transistor and Pyre were both rather simple and small games when it comes to gameplay. The rave reviews they got I think has to do with how the games were presented (both visually and with great sound), that they have pretty unusual stories and ideas and that the gameplay that is present is well executed. Gameplay wise something like a Bioware game would be a huge step up in content and scope and would probably require a much bigger team.
Yes, I admit it's an old company, a large scope and they'd have to choose carefully.
Skipping a few less-known or cancelled titles, I'd find it interesting to be their debuts (BG, BG 2, NWN), but most people have left and they'd have to chase them down. They'd have to remember about it, too.
Then there's KotOR and Jade Empire.
And what came after EA's acquisition, which may be more controversial, but also more interesting to a larger audience, and probably easier to make: Mass Effect and Dragon Age.
They've already done well-known names like Arkane Studios, id Software, IO Interactive, Obsidian Entertainment, and also bigger companies such as CD Projekt. They can pick a game, see its reception, and grow from there to a series or other games, using their initial contacts.
I don't think the number of developers is much relevant, they usually limit the interviews to the game director and a few development leaders. The Witcher wasn't a small project.
One issue may be the key people who left, but they managed quite well with remote interviews, so even if they couldn't travel to different places, it would still be possible to stitch it together.