How would you say it compares to the previous's game's Dark Beast Ganon final boss fight, which many criticized for being similarly too easy?
I think Calamity Ganon is a slightly harder, its been a few years since I last beat him, but I remember being at least slightly challenged by both forms. Gannondorf I was just able to tank him and wail on him. I dont know if having the Master Sword fused with boss material had a factorin it, but it hits Gannondorf like a mack truck. Any other boss and its just doing slivers to a health bar, but Gannondorf it takes chunks off. It was late at night I was tired, and I had ALOT more trouble getting to him, so I expected to get my ass handed to me at least once. Becuase there is SO much buildup with him, and his Demon King form looks very Similar to Demise who is one of the harder end bosses imo, but no I one shot him with no problem. I felt like I was very over prepared.
I think, overall, this might be the easiest Zelda game. All the really hard stuff is completely optional, the shrines, about a 3rd are blessings and the rest thanks to the new powers are extremely cheeseable. The only boss that gave me any real trouble is the Water Temple's due to its second phase and that was just more annoying then hard. Second place goes to Lightning Temple's boss, and that was my fault. I ran out of arrows literally half way through the fight, and its basically impossible to beat. It was also the boss that taught me I needed to upgrade my armor. Even Gleeoks aren't THAT bad, if you got a x3 bow and good supply of eyeballs, but before learning that, yeah they will murder you.