My mini-guild has been stuck at guild level 5 for a while. We were aiming to upgrade our guild hall to level 6, but the requirement to hand in 150k+ influence presented a bit of a brick wall. It's a currency that can only be earned by running heroic encounters in the stronghold, at a maximum rate of 400 per character per day. I think it's obvious why this presented a problem for a guild that rarely even has three people online.
However, the latest patch brought with it a welcome innovation in the form of temporary buildings, specifically one that generates about 2400 influence a day for a week, assuming you tend to it regularly. Erecting this structure also costs resources of course, but they are resources we actually have and can now convert into something we need. Maybe we'll eventually get that level 6 guild hall after all.