Hi,
I don't think it's appropriate to only consider GNOME3 as an uptodate desktop. And given that, for other desktops (e.g. XFCE) it's not only a matter of speed, but also a matter of comfort (direct access to LO from the panel). Beside, if this bug didn't occure in LO, there would have not been any occasion to disable it. So, why not leave Quickstarter enabled as long as libreoffice-gtk is around. The necessary steps on the part of LO have been done. I don't see anything sensibly speaking against.