I wouldn't blame Larian to not want to deviate from their most successful formula, especially is the said formula allowed them to turn a niche genre into the most popular, critically acclaimed and profitable game of its category in at least the past 10 years.
What? cRPGs as a whole are still niche. Unless this is just awkward wording, because yes, DOS2 is the best selling cRPG in the past 10 years. DOS2's reach is still a drop in the bucket compared to many turn-based JRPGs also released over the past decade though.