I just recently joined a new guild 3 months ago. I shouldn't have to find a guild when I would rather work for it instead of joining a guild with content all on farm. There is zero fun in that and then I feel like I did nothing to work towards that. ToT should have another month or two at the latest remaining at this point. Unlike other people, I am not a guild-hopping scumbag and just leave like a breeze and take advantage of guilds when they don't fit my requirements anymore (not going to get into detail but, its people like that -- that ruin some raiding teams, when they lack commitment to a team and cause guilds to not progress as much). I'm in my second raiding guild ever and I was in my last guild for over 3 years.
I do deal with it but, I have every right to feel rushed and complain about it. LFR has shortened the length of tiers. I never had an issue with ICC when it was out ... and I think the reason people got so burnt out on DS was because of the introduction of LFR and the nerf/accessibility for alts. I got burnt out with LFR fast but I never got bored of the heroic progression, even after I full cleared it with two guilds on 2 characters.
Honestly if they put in all this work and SoO gets cut off at 5-7 months, i'll feel very jipped. I'd expect at least 8-9 months out of the tier, especially if it ends up being challenging.