If 5.2 is released at the end of Feb, the 5.0 raids have been out for 5 months.
I don't know how someone can take that, and with a straight face, claim 1 month was eaten up in leveling and 2 months were eaten up in vacation. And since they didn't have enough time with only the remaining 2 out of 5 months, they honestly feel everything should be held up because of their personal situation.
But, I saw just that a page or two ago. Wow.
If you are still progressing after 5 months, then, while you might not like hearing it, you're not as good as you think you are and no one outside of you and your guild cares about World 401st or whatever, nor your FoS. Sorry.
But, if your heroic progression and the sense of pride in clearing it as originally intended is really that important to you, you can still progress on those unfinished bosses
before moving on to the new raid. It's what guilds did back in BC when some were still stuck in Kara while other guilds were in the T5/T6 raids. (You know, BC, the "Golden Age" of WoW.
)
And if not, then as someone else already put it, this is just a case of "Woah, my guild still hasn't cleared it! Too fast! [A month later] Okay, we cleared it, so now anyone else that is still asking for more time needs to just L2P. Bring on the new raid!"