Help files do, as Narissa has pointed out, limit and/or ruin possible roleplay. Yet, another good point brought up is that everyone already knows everyone anyway, and a lot of people keep close tabs on others, so a switch in city, guild, or professions wouldn't really be to difficult to follow, especially when you notice someone practicing new skills.
The idea would be nice, if, as previously stated, there were a higher player base....which won't happen anytime soon, if ever because not only do you have to pay to play, you have to pay an unreasonable amount every month, or buy a life subscription, which a lot of people see no point in when they can play other games for free, that have 100+ players on active at any given time all day.
Avalon has never really been the RP type of place anyway, mainly due to a large portion of the players in it not being interested in rping or just being ignorant to it. If anything should be deleted, along with the help files, it should be things that ruin the chance for rp such as the lol emote, terms such as CCC. And if you want to get extreme with rp, you would limit yourself to using only says and letters for communication, as it makes no sense to be able to talk to people across the land, or waste gold on sending them a mental memo.
Just my thoughts on the matter.