I second some lusty argonian racial changes. The potion thing is nice, but not GREAT unless you actually build around it specifically which I don't want to waste jewelry enchant slots on more potion bonus.
The resist poison/disease is decent, but not a ton does damage with those.
Swimming? WOOHOO. I mean its cool I now swim in first person and do it super fast, BUT THERE ISNT ENOUGH WATER TO MATTER. Or rather, there isn't any content that it is beneficial to move through water quickly for. Its just a complete useless toss in for lore purposes I guess.
If they want to stick with lore related things, or stuff close to the lore, give us more health regen since argonians are supposed to have superior self healing abilitity, which is where the resistance to disease and poison comes from.