Naah, the 50 minute fights are mostly with the huge monsters or multiple, when you solo them.
In MonHun Freedom Unite (basically "MH2Ultimate" of sorts), I played the entire game solo, and with dual swords, which are not great at burst damage, but damage against distracted or still enemies. Steady stream of damage when I had the chance. But, because I was playing solo, and thus didn't get chances to really pile the damage because I was too busy dodging, some fights took me really really long.
But I still played the game for hundreds of hours because those fights were engaging