Personally I don't mind shuffling stats around, especially taking into consideration the table in DMG (page 274), which I imagine Larian follows.
Besides Bulette is "level 5" in MM. As for the Bulette + 2 Minotaurs that's roughly triple the deadly treshold for the party. From my experience double the treshold is totally doable, even somewhat easy. With surprise, having high ground, and preparation it should be a challenging, but winable fight even on tabletop.

Last edited by Bearhugger; 09/10/20 05:26 PM.