I don't really care about them other classes so this is just new Cap't & Hunter stuff 
Hunter:
Barbed arrow no longer sucks !!! apaprently its actually good.
Skills fire faster, meaning if you're spam happy you'll have no power left alot sooner.
New legacies - merciful shot cooldown - S:Precision crit magnitude - +AoE targets (up to 10 rain of... targets :D) - Speed run increase, lol.
Old legacies - Ind/Focus crit now tops at +25% - Needful haste tops at +15sec - Agile self Heal chance now goes up to 50% and heal is much larger.
Port skills can be used from the skills menu, no need to drag them onto a bar.
New armour actually looks nice for a change.
Captain:
Upgraded skill is the nearly always useless Withdraw... :(
Slight reduction in power costs.
New legacies - extra 5% morale on MS - Outgoing heals% on emblem
Old legacies - BoE damage tops at +25%
New armour looks abit pants.
In general, a weapon with good legacies is much easier to find but they will likely all be lower tiers. So instead of grinding crap to find a good one to start with you just have to get the scrolls that improve tier from skirmishes. Less LI crapness is a good thing imo.
Cos of the changes to combat everyone will burn more power as standard so fate will now give more ICPR than it used to.
Vitality now gives more morale per point than it used to (only! for wardens + guardians i think?)
ALL outgoing healing is now affected by Will for some reason, stats capping at 650 now i think as well.
Also, lots of piccies.
(part-time Tailor, reformed DF'er, one-time chicken)
Rowanath Huntaaaar/ Narlonath