Actually if you wear exp shoes other ppl in party do not get more exp and it will be the same for this gear, person wearing it is the only one that gets more exp than normal.
I don't think it would have the effect of creating new woe guild, it's only my opinion however as I can't tell the future any more than the next person, but I can guess and I don't see this being a big decisional factor. You really just need guild level 1 (approval) to woe, sure recall is useful, extension for more ppl can't hurt, but it's not a mandatory thing, so people wanting to woe should probably concentrate more on their gear/level than the level of the guild.
