I have been using Mudfish for WoW for about more than a year already. Recently (about 2 weeks ago), the connection has gotten worse with Mudfish on and i have to take it off to be able to play WoW smoothly. The only item i have changed recently is to disable tcp/ipv6 as it interrupted with my use of discord. Other than that, everything remained status quo. Please assist on how i can fix this.
Not sure why at this moment. 
Did you try to change a mudfish node based on FAQ - Nodes section for your game item? If you’re using the advanced mode, please start with the basic mode. Which mudfish nodes did you try?