Going by unconfirmed rumour, my human paladin is going to get redundant racial weapon/armour proficiencies, lose 2 points of Dex, but can carry another barrel (?!):
16,14,14,9,12,14 becomes 16,12,14,8,12,14
That's a downgrade.
I want to have a fair archery skill without sacrificing Con, but paladins re MAD and default human allows me to hit the numbers I want. Throwing javelins requires extra clicking and believe you me, all those extra clicks are felt after a couple of hours.
I'll be looking at Mods asap.
Its all going to depend on the race buff weapons really. If the race weapon bonus is strong enough the redundant proficiency won't matter.