GitHub also has a project tracking feature:
https://github.com/ZeroK-RTS/Zero-K/projects?query=is%3Aopen It very much sounds like you might have meant to call this thread Project Tracking instead of issue tracking -- which are two very different things.
Before ZK was established as it is currently, the project was tracked/managed with SVN -- but it switched over to Git, and for good reason: it's powerful, flexible and popular. Even if it's not your personal preference it is still worth learning because it is generally the preferred collaborative tool.
But honestly project tracking and direction is not a technological issue, it's a people issue; whether you want to classify it as politics or manpower -- gaant graphs and product management tools lose their effectiveness when all the work is done by volunteers, who have no obligation to follow them. You can introduce a roadmap filled with your ideas for what would be the best goals/features/milestones -- but ultimately it's your own responsibility to implement it -- some people might agree and help out, but others might disagree and simply not work on anything proposed, but rather what they personally want to see happen.
Personally I have my own set of goals / roadmap for the ZK website outlined on my own branch. I bit off a bit more than I could chew and burnt myself out on it multiple times. Certainly I would welcome contributions to it, but it's a bit counterproductive to spend extra time on overhead directing people when they will just disappear at any time. Even so, that is only for the website, which is only a small part of the ZK Infrastructure, which again is a smaller part of the ZK project as a whole. When you're asking about project direction, which part of the project are you referring to? Do you have any roadmap or have a prepared set of features already?
If you have any specific actionable ideas (or heck, even vague pie in the sky impossible ideas) there's lots of places to engage and share them. Here on the forums, or in the various development channels on Discord are viable options aside from the aforementioned ZK GitHub platform.