Summary: Guilds/Orders currently have message group lists for
All / Some
all Full members (corresponding to "Members" members on the ranks list)
all Elder Members (corresponding to "Senior" members on the ranks list)
But there is no message group list for the "aspirant" ranks, nor is there any message group for ONLY Full members, or ONLY Aspirants.
Details:
Add the message group list option for only "aspirant" ranks and another for only Full ranks. Call it... "Only aspiring members" and "Only Full members". These message groups would create a "reply-to" list consisting of Only X members + the sender of the message replied to, if not already included.
Benefits: Best one I can think of is for the leaders of the guild/order to be able to mass-message all the aspirants to tell them what to do to get to be full members. Additional uses for Adventurer guilds, etc. to be able to communicate only amongst certain ranks, so don't bother the Higher ups with piddley crap.
Possible Downsides or Exploits: Uhhh I guess it may make people's lives easier, so that's a downside in some circumstances (adventurers?), as 2nd post pointed out, it makes the exclusion of certain people from guild messages easier (ie top tiers could message fulls only and no other top tiers would see the message).