Ahh I didnt find MH bosses fun, having a lot of health, just meant you were doing the same thing over and over again. Maybe I played it wrong but the scope of the bosses were nice but maybe Duantless is different.
You not only need variety, but a great boss to me, is like a puzzle. Not in a jigsaw puzzle kind of way but like quick problem solving, learning moves, and then countering, and having multiple stages.
Most bosses in games do the sme thing over and over again with a massive health pool, and it just ends up being hack, dodge, hack dodge, unitl theyre dead.