But not higher difficulties... at all. Game is not built for encounters with large parties in the slightest. That would require rebuilding the entire combat experience from the ground up in a span of a few months.
I think this entire conversation is predicated on not enough information. If, as has been commented, this has been discussed before, we none of us know what Larian has (or hasn't) been doing in the background. it's best we don't get into an argument over something that we, none of us, have any facts about.