“Reading the reddit threads, I would like to clear up something,” Vincke said. “WOTC is not to blame for us taking a different direction. On the contrary, they really did their best and have been a great licensor for us, letting us do our thing. This is because it’s what’s best for Larian.”
I don’t think they “are to blame” (i.e. main reason), but as you say, reading between the lines, it sounds to me like they were definitely part of the reason.