Why assign copyright?
It may be pertinent to note why anyone would have assigned their copyright to the FSF in the first place:
> Under US copyright law, which is the law under which most free software programs have historically been first published, there are very substantial procedural advantages to registration of copyright. And despite the broad right of distribution conveyed by the GPL, enforcement of copyright is generally not possible for distributors: only the copyright holder or someone having assignment of the copyright can enforce the license. If there are multiple authors of a copyrighted work, successful enforcement depends on having the cooperation of all authors.
> In order to make sure that all of our copyrights can meet the recordkeeping and other requirements of registration, and in order to be able to enforce the GPL most effectively, FSF requires that each author of code incorporated in FSF projects provide a copyright assignment, and, where appropriate, a disclaimer of any work-for-hire ownership claims by the programmer's employer. That way we can be sure that all the code in FSF projects is free code, whose freedom we can most effectively protect, and therefore on which other developers can completely rely.
So, if you care about people actually obeying the license, and don't want to bother engaging with infringement legal action yourself, copyright assignment to the FSF may be advantageous to you. Personally, I don't see any of the FSF board's recent actions as impinging on their ability or intent to defend and enforce Free Software licenses.