Poor Swampert he got almost nothing this gen while everything else gets better and better (well not everything but a lot of stuff^^).
Damp would have been great in Gen4 where it got bombed into oblivion from metagross and heatran all the day, but with explosions nerf it wont be much of a use (actually it might hinder you if something weak cant blow up on you :/ ).
Boiling Water is great, but almost every water type gets it and the 30% chance is far from reliable and if you got a bad day you just burn that guts robushin that now kills you more easily.
Still no instant recovery sucks hard because both other Water/Grounds get recovery and both got excellent abilitys with Gastrodons improved Storm Drain and Quagsire might gets Unaware wich is one of the best defensive abilitys that exist.
100/90/90 are solid defenses, but there is so many extremly hard hitting stuff that it might be a little too less even with that good defensive typing.
Nattorei, Shandera, Lati@s , Salamence, Garchomp, Breloom, Doryuzu (Swampert won't like a +2 EQ and don't think that Boiling Water will KO it) , Sazandora, Robushin, Jarlorda are some of the biggest threats this gen and all can plow through him.
Not to mention that Spikes are way more common and really hurt him as he got no way to recover back the health lost.
However its not all Shit for him he still got his very good 110 base Attack and an usable 85 base SpA, a resistance to SR and an excellent defensive and offensive typing and his move pool isn't bad too.
Swampert needs to adopt to the metgame and i think he will come out as a more offensive Pokemon that will utilize Choice Band and Curse to pose a threat rather than stop them as he did last gen.
I'm fairly certain Boilng Water and/or Surf KO Dory. Waterfall is almost a OHKO, and is with some form of damage on it. Swampert also takes a +2 Earthquake quite well, and keeps a respectable amount of HP [~40% before Lefties]. Swampert is one of the best ways outside Priority to stop a Dory which gets in safe. Hit it while it SD's with whatever it got in on, let the victim die, Swampert will finish it.
Even more fun when Swampert roars Dory in. Switching in twice puts Dory into Waterfall KO range from my Swampert, and Dory 4HKO's Swampert at +0.
Yeah, Swampert's still an excellent tank, and can be massivly annoying with hazard support, and a Roar set. Hazards + Roar = Win.