yeah, if you asked me, I'd say mana tide, dual wield, parry, 2h weapons and ToW should all be default skills for shamans. I mean, mana tide's the only one of those that's a make-or-break skill in terms of survivability, but ToW gives a decent fire buff totem (and it's not worth the investment vs. NS), and the other 3 should just be trained at the same level you'd train them from talents.
and I personally feel like pallies should get holy shield by default, some kind of spell interrupt, blessing of kings, and some kind of melee skill. Not something as good as crusader strike, but something you can hit so battles aren't just debuff -> cast seal -> alt tab until the fight is over. Holy shield isn't really the definitive tanking talent, but it's pretty crucial and it would allow a ret/holy pally a better chance at tanking an instance. That probably seems weird, but blizzard wants pallies to tank, and if an arms/fury warrior can tank, at least giving ret/holy pallies the other half of the 2 core tanking skills (we already got consecration with 2.0/the expansion) would make it so if you can't find a regular tank, but you have the gear, a ret/holy pally can maybe fill the need.
actually, I think shamans should get a melee skill by default too, and it could be sort of like sinister strike, so it'd favor 2h or a slow main hand weapon, even though that kind of makes shaman dual wielding more cookie cutter. But if they don't want to give shamans a melee skill, they could go and actually make shocks efficient enough for someone who doesn't have 8k+ mana.
I just find it weird, because while blizzard said they want to make pallies more into tanks and shamans more into DPS, well, they haven't quite given them enough options. I mean an enhance spec is good DPS, but it doesn't feel "complete" to me, and yet it definitely makes the other aspects of the class weak. With pallies... well, they only have one truly viable role at 70 and that's as a healer. The prot tree for pallies takes too much if you ask me - pretty much all the builds that get all the necessities are 42 points minimum, but typically more like 47+. In both cases, you can overcome the huge limitations that tend to be put on you by going with a non-healer spec with enough gear... but you can overcome nearly any limitation with that kind of advantage, so I hope they actually get to work on improving these 2 classes instead of nerfing them soon.