Could you provide examples of political discussions on the EA Forum that appear to have negatively impacted the forum’s environment or impaired its ability to achieve its objectives?
As far as I remember, the political discussions have been quite civilized on the EA Forum. But I think this is because of the policies and culture the EA Forum has. If political discussions were a lot more frequent, the culture and discussion styles could get worse. For example, it might attract EA-adjacent people or even outsiders to fight their political battles on the EA Forum. Maybe this can be solved by hiring additional moderators though.
Also, politics can get a lot of attention that would be better spend elsewhere. For example this post about Trump generated 60 comments, and I am not sure if it was worth it.
In my opinion you have not really argued why it is neglected. As a starting point, they seem to spend roughly $35 million per year: https://projects.propublica.org/nonprofits/organizations/824506840. $14 million of those are for salaries, so I would be surprised if new features are strongly bottlenecked by money and talent.
I am just guessing on these issues, but my suspicion as for why some features such as “live location sharing” and “display past encrypted messages from the group chat you were not a member of but only just now joined” are not (yet) implemented because they do not fit well into Signal’s approach to security/privacy.