Sort of. The fire axe animations have very obvious flaws that needed correcting to get it to look consistent regardless of what hand the weapon is held in.

Flaws in the bat animations are a lot less obvious since the katana and golf club use them and are attached to the right hand, and as you mentioned, they look fine for the most part. But there are still some animations - most notably shoving and swinging - that do not look correct unless patched, most likely due to the katana using its own unique swinging animation.

So you could perhaps get away with not patching the animations, if you can ignore the more subtle issues with some of the animations. But I wanted to ensure all the animations looked as consistent as possible, so I patched all of them.

Is not possible to make Bat models work similarly to Katana/Golfclub then? Since those were right handed and didnt seem to have issues with the original anims, so animation patching wouldnt be needed right?

The katana and golf club being affected by this addon is unavoidable, I'm afraid. They are indeed attached to the right hand by default, but since they are programmed to use golf club animations it means that their models will be slightly misplaced. I will probably upload patched models for these weapons to provide better orientation.

But aren't Katana/Golfclub already right handed? They seemed just fine with vanilla anim..