I’m not worried. I know of at least 3 core devs who have expressed interest in being on the council and there’s already been one external person who has asked for someone to nominate them and I know of at least one other external that some people are interested in nominating. I don’t think we need to prematurely worry about not having enough candidates.
I think a better solution is to say that self-nomination is not a bad thing and core devs should feel free to do it. And then on top of that everyone should feel comfortable asking someone if they were planning to self-nominate or whether they would be comfortable being nominated.