They seriously need something like a 48 hour sub. Let us pay like $1.99, limited to once a month, to sub for a couple of days. There have been times where I've petitioned for a few days to get my account in order (Once to clear out auction house stuff before mothballing my account, once for gathering the gold from various characters and accounts to buy a WoW token, etc), and they have always given it to me, which is nice. But it usually takes about a day or more to get a response.
Give us the ability to sub for a couple of days. Something cheap, non-recurring, time restricted (so you can't just spam it).
The reason I bring this up is because I just paid $15 to install WoW, log in, get the movie transmog stuff, log out, and uninstall WoW until I'm ready for Legion. Did I need to do that? Not really. But I'm a transmog whore and didn't want to pass free transmog gear up. I'm not playing WoW until Legion, so I just paid $15 for the gear lol.
In hindsight, I probably could've petitioned for a few days to log in and do that, but I didn't think about it at first, not until I paid for the sub...