Class changes are a fairly integral part of pvp. Specifically, the separation of healing power and spell power but also other balance changes. They already said they're reworking the arenas(they actually closed it atm on alpha, along with the fishing contest). Seems like they might keep them but will "adjust the rewards", which I hope it means you get shitty titles instead of honor points so there's basically no point in doing them other than for fun. In the russian version from what I heard arenas were removed entirely so that's a possibility too. Factions don't matter to pirates so whatever, not sure what you mean on honor stuff, I guess you mean getting honor for pking your own faction? Meh.