Tears is tragic in that it perfectly addresses criticisms of weapon durability with fusion. It allows you to combine dropped monster horns with your weapon to increase your damage and since those horns scale with the enemies it means combat is never regression in your weapon damage. The horns you get back make up for the weapons you burn through. Only, fusion also brings in the construction mechanic which completely mucks up the game loop. Fuse goes far beyond gluing some logs together to form a bridge, it completely dominates all aspects of the game.

There are other criticisms such as the underground area being way too big, being same size as the world map with only one biome instead of multiple sub-areas, but none of them are as cursed and double-edged as the fuse ability.