This story only seems to be a case of political pressure to do so, regardless of the effort a rewrite may cause. In this regards, FSF is clearly putting the value of the license above the value of the software itself.
This is why I can't endorse the GPL: it is mainly motivated and designed to deny authority over software ownership, not for actual openness. If somebody really want to open up a piece of software, Public Domain is the way to go.
I mean, there may be times when the FSF does stick foolishly to principles but the "because we've decided it's OK to be halfway open and accept putting copyright control in the hands of a random company, you should bend for us" argument does not seem compelling.
It sounds like the mom and kids dynamic "can't I break the rules this one time, [XXXX very 'just, reasonable' sounding excuse]". The reason you have blanket principles is that otherwise someone finds a single exception that sounds emotionally compelling, then the exception becomes the hole that more or less everyone just drives through and "inconvenient" principles go out the window.
Also, the article doesn't say anything one way or the other about releasing the library LGPL which would seem appropriate for a library which could then be used by a commercial product.