Very simple, I just read this entire thread. It sucks to work hard for little pay with your only bonus being given credit for designing a product, only to have that credit taken away.
The IP for this knife is owned by Cold Steel. Wallace, designed the knife for Cold Steel. He offered input for improvements to the knife, which GSM management turned down. These improvements appear to have been added later and the credit for these improvements given to this slash character, but which in fact were the improvements wallace wanted to make and was turned down. And wallace has the proof in a 2021 email where he said as much. This whole issue is less about slash and more about GSM doing the typical corporate board of directors bs and giving someone else, who has little to no real world experience, the credit. As for the knife itself, the design is not as relevant as the process to get there. The process was mostly done by Wallace, yet no credit had been assigned to him. The reality is, those that matter on this forum will know the truth. The fact is slash couldn't have much input considering that he really can't swing a blade well as it tires him out fast. He has trouble chopping little sticks as well. So the changes were from wallace and GSM knew this, forced wallace to not make improvements so that they could do this later without wallace. The typical bait and switch, or maybe reach around. The fact that GSM picked this slash character, probably shows how out of touch with the knife community they are, and they are more likely trying to cater to the mall ninja crowd.
And in case others missed this post by wallace showing his emails during the design time, here is the relevant one.