I had the LO "Quick Launcher" option once on my Ubuntu desktop [10.04 GNOME and now 12.05 MATE].
The problem I found was if you want to upgrade any extensions or add-ons, the quick launching options can stop it from working. Some require LO to stop running completely for the upgrade process. With the small portion of LO the quick launching uses, the upgrading thinks LO is running completely. This option will not allow a full exit and restart of LO if it is needed for the extension needs a restart of LO.
Since LO starts rather quickly on my system, the quick launch option does not reduce that "boot time" by much. Now if I was running a lot of "windows" and had a major file copy/paste "action" going on my primary system drive [c: for windows and /sda for Ubuntu] then it takes a lot more time to launch LO and the quick launch option might help.
But, by default, I do not use that option.
Actually, I just had to do a clean install of LO 4.0.5 on my default desktop, due to a failure of the primary drive. Just finished rebuilding the replacement drive an hour or so ago. Had 3 drives, a 1-TB and two 2-TB. Now I use three 2-TB drives. Used part of one as an internal backup of the "/home" or "User" folders, but lost about a week or so of files due to the timing of the failure in the backup schedule.
So, I was re-looking at all of the options in the Tools>Options dialogs a few hours ago to decide what would be the best for my. I did not check the quick launch option, but did some modification of the memory options.
As for the "print drivers" from the thread subject, well I use the "Linux ONLY" use Tools > Options > LibreOffice > General --- Print Dialogs > use LibreOffice dialogs check-box. This check-box is not in the Windows install. I do not know if the RPM installs have it either, since I use 64-bit Debian installs.
Also I do not run "parallel" installs of LO or LO and AOO.