Wb is easy to "master', decent at support in mass pk (rebuffing/giving chi to squad members, harassing enemies healers since few people will bother targetting you) as well as a strong 1v1 class, good dd and soaks up damage fairly well (Best tanking class if you stat vit but then you become useless in other departments).
Wr is hands down the hardest class in the game to truly be good at, best support/crowd controller in mass pk (constantly buff to increase phy resistance of your party, aoe stuns/slows to keep opponents still and easy targets for your dd's or to protect your guildies, several amps which make anything drop quick as well as a handful of other useful things like pulling people to you, aps/channeling debuff, leaps which work the same way as tidal/focused mind) a good 1v1 class with 100% stunlock if you get good enough, okay dd and unprecedented tanking abilities.