First problem is not enough people to do with or just unbalanced biased against zergs.
To fix this is make the objective marker have a downscale damg return such as this when you have like 30 people on one wall make it so those 30 people equal to 10 player effort.
This doesnt effect defender because there is generally only 5 that can make it in while the rest is running to get inside to help.
either that or upscale the dam walls or how about let player dump supply into keep etc
Because atm iTs going to be like who ever have the most legendary in per group raid is going to win plain simple. Oh and remove unicorn its block/laggin myscreen in WvW to see whos dead /not