To kite and carve hard with power, at least the side fins really really
should be glass or better not polycarbonate or nylon cheapo plastic fins (ie fancy fins, glass carbon, g10 whatever).
I would highly recommend you buy at least a pair of strong stiff glass fins for the forward pair of your quad and ride it some more before ordering a custom.
Keep the plastic ones on the rears if you want, or get a full quad set of glass ones, with the back ones not too big.
You may still want a new ride, it's only natural
But you may get a lot more out of the board you have, and learn more about what you want to complement it, rather than just replacing it.
Could be the best $50-100 or so you spend on gear this year!
For a quad it may be worth it to get the fancy foam cored resin infused kind, 4 glass fins is heavy...