That's super cool and I really like how the website shows you the effect each weapon has! The most I've seen a server do is make is so axes, sword, and clubs had their own special effect.
I've never seen someone make it so each individual weapon has it's own unique ability. I had a friend who was making a server where each item did something special but he never got around to finishing it.
The problem is thinking of proper effects for the weapons. If I have a 20 attack axe with a cool ability, but then I find an axe with 33 attack but the ability isn't very useful, then you're faced with a dilemma.
It's also extremely hard to balance in terms of PvP because of all these new abilities. For example imagine using the axe that constantly makes someone drunk.. that would be a bit crazy haha.
This is still a unique way to customize weapons and I find it intriguing. There's so many ways you can go with this and I'm interested in what you'll end up doing.