Ken needs to bone up on the technology before he deserves to be paid to push it. Just my opinion.
If we all had to wait until we had a perfect understanding of Bitshares before we could promote it, there would be like 10 people in the world capable of promoting it. Better to promote, and learn more while you are doing it.
Ken has already spend some of his own money paying for translations of articles and videos, and he has gotten us multiple news articles. He is providing better ROI than plenty of other paid delegates, I'm sure.
We need to be more encouraging to other community members who are working hard to promote bitshares. Its hard enough to keep motivated when the price is so low, if the community is negative towards you it is even more difficult.
Things will be better in 2.0 with referrals. We wont need marketing delegates. That means less inflation, and it means that promoters get compensated based on their results. Then no one will need to complain about whether a delegate is doing enough.
In the meantime, Ken is doing more than the majority of our marketing delegates I think, so if you want to vote some out I'd suggest you start with some of the others who have quit and are just redirecting funds to other peoples projects.