F-Droid is not a single repo, but a place where everyone can create their own repo and start distributing software.
100% this.
The main F-Droid repo is FOSS-only for good reasons, and thousands of people choose the main F-Droid repo because they want software that they trust to be FOSS.
There are dozens of other repo with different, often less strict inclusion rules.
So no, we shouldn’t relax the rules of the main repo. People are free to use other repos.
For the main repo, what we should do, is “get better” at building new releases “timely”. However, that is a long standing issue, has been discussed in many places, and has no easy solutions. There’s the build cycle taking a few days. And there’s Firefox being painful to build. See Fennec and Mull update delayed and other forum threads.