Having recently come back to GW2, I started looking around for a new guild, (which I am still looking), and think GW2 could improve the guild window functionality as far as recruiting new members.
When a new player opens the guild window it should default to a tab that shows a list of currently recruiting guilds that have an active recruiter online, with a brief description of the guild’s focus/play style, as well as levels/classes/trade skills they are currently looking for as members. The player could then apply directly for a guild they like the look of , and a message would be sent to the guild recruiter online that they have an applicant.
Currently guilded people could also use use the same tab if they are looking to join another guild.