You mean you are having trouble pinching? Or is it keeping her in/out of irons?
If you came from a monohull background, you'll be pretty frustrated by the way our tris point. Plus the old 2008 rudders were easily overpowered. The new ones are a great improvement in strong wind.
Also, our furling sails are unevenly shaped foils. As your twist and stow rudder will be when it's stressed. The rudder and up/down lines could just be stretching, due to age. Inspect them. Adjust them.
On the water, you can usually improve things just by using the dagger, reefing some, and pedaling slightly to maintain bearing. Also, my favorite: pulling the drives and hiking out.
Otherwise you may have an alignment issue with the AKAS/AMAS. Or some other source of drag on the port side.