for me the frame rate is not a problem... but definitive the game need to fix it, its almost imposible not get at least 50 fps when the game is not a the last of us in graphics... even this last one can be in 60 fps without problem.
The graphics are ok, but dont be a problem to drop 30 fps... i see that the main problem is the water area.
poor of the team development of the game, will be crush by Luigi Mansion 3 or another game