To be honest, most new items or weapons on this server are often given plenty of time to test and edit them so that they seem original and not just a gimick like a reskin. It's a lot more meaningful to make new items that fill a new niche previously not achieved by the current roster of items already in the base game. For example, take the concept of a double chainsaw as another twin sword type weapon. There's plenty of other twin swords in the game already, two of the most favored being Sange & Yasha and Jizai for example. Both give a nice amount of ATP and Jizai even has the Hell special, which is a nice touch. Now you have to think that the Twin Chainsaws would be a nice new weapon to include, but you have to think of a way people would want to use the new weapon over one of these two. You can't just go and make it stronger with more ATP because then it becomes overpowered. So you have to give it other stat boosts, or perhaps make it a weapon to use in combination with other items, such as a slot item or certain armor piece. You could also give it a different special not done in the twin sword category before, like Demon so it reduces health down. Then they could be black or dark purple chainsaws to fit the demon theme.
My point is they have ideas thrown around in this server, but usually only the very plausible or very popular ideas within the community will even make it into the game. I do like the idea you have here because to be honest, in the vanilla PSOBB I very much enjoyed my Chain Sawd, and I hate to see it underused because other swords on this server outperform it.