Most bulky waters, as already said, at OHKO'd by a +2 Hi Jump Kick after Stealth Rock damage. You can't use the fact you can protect, because the Blaziken user can also predict that too - prediction goes both ways.Thanks for the reply, but I have to point out the flaws in your logic. Ace Attorney Style...
Life Orb has a role here. It also depends on the dead Pokémon's current HP. Fire is an easy move to resist in OU (Bulky Waters, Dragons, Heatran...), so it shouldn't be too hard to switch in a Bulky Water or something to stop Blaziken. Common Bulky Waters are Vaporeon, which has Protect at all times with Wish, Milotic, which has Haze and Recover, Tentacruel, who completly shuts down Blaziken, Gyarados, who can intimidate Blaziken and then switch out on the Stone Edge, Starmie for being ultra-offensive and resisting the STABs and Slowbro for being having the same typing and better defenses. I just named the most common Bulky Waters, there still are Dragons and Flash Fire Pokémon who can take it down. No team is weak to Fire, so Blaziken can never wreck that much havock.
Gyarados, regardless of investment is OHKO'd by a +1 Stone Edge from Blaziken and dies to HP Electric from Mix Blaziken. The flying dragons also lose to Stone Edge with SR, while the grounded dragons die to Hi Jump Kick.
Seriously, the calcs and actual practical testing show just how devastating it is. Even without the sun, it's still absolutely absurdly powerful.
You can't just say things like "smart players will lure out Blaziken" because that's awful logic. You can not use prediction in these sorts of debates because it goes both ways.
Blaziken isn't easy to wall, not in the slightest. Along with Salamence and Hydreigon (which doesn't get a +1 speed for free at the end of every turn) it's one of the best wallbreakers in the game right now. The difference between those guys and Blaziken is: a) Salamence and Hydreigon are much easier to revenge kill; b) they often use moves (Outrage and Draco Meteor) which are extremely powerful but often put the user at a disadvantage.