The further Abdel stays from this game, the better. He was already a horrible character before MIBG, having him get murdered by Viekang of all people and his death undoing the entirety of the original saga by bringing Bhaal back is just the cherry on top.
There's a book you can find in-game IIRC that refers to the Bhaaalspawn with gender-neutral pronouns, which gives me a small sliver of hope that Larian is planning on keeping the Bhaalspawn's identity ambiguous. Though Abdel's inclusion in mtg recently could be indication in the opposite direction.