I'm a few days late but Jinro's matches vs MC show how imbalanced the warp gate is.
Before people start going batshit crazy that I just said Protoss is imba keep this in mind: Protoss is the ONLY race that can FE with absolutely ZERO penalty and the Warp Gate is the reason why. When Protoss FE they get their first round of gateway units and can immediately double that number with warp gate thus protecting their expansion or adding crazy early pressure against a FE Zerg or FE Terran. Not to mention with a single pylon they can constantly warp in a shit ton of reinforcements right next to the battle. Zerg and Terran cannot do any of that.
Jinro lost to because Terran can not out macro a Protoss or Zerg opponent if both players are equally skilled. Now I know somebody will go what about Jinro's Ro8 TvP? Jinro won macro games against Protoss during Ro8 because his macro skills were just flat out better then his opponent and his opponent made some very bad decisions. However, after going up 2-0 Jinro struggled and damn near lost because the Protoss decided to NOT try to out macro him and abused Warp Gates instead.
Mark my words: Warp Gate will get nerfed in the future especially if MC wins GSL3.
People complain that TSL_Rain cheesed his way to the GSL finals and that he really isn't all that good. I just laugh at stupid shit like that. Rain did exactly what I would do as Terran with the game in its current form: Try to end the game in the first 12 minutes. If Terran doesn't end the game versus Protoss in the first 12 minutes or do heavy damage during that time to the Protoss economy, they WILL lose unless the Protoss player makes some huge blunder like the end of Jinro's Ro8 set 5.
If TSL_Rain goes for the throat and tries to end every game in the first 12 minutes or does heavy harass during those first 12 minutes to keep the Protoss economy in check, he will win. If Rain tries to out macro MC he will lose.
My pick: oGsMC over TSL_Rain 4-2.
PS: Don't take anything I said as a slight against oGsMC and his skill level. Part of being a great player is knowing everything about your race and abusing whatever you can in order to get the win and MC does that incredibly well. A Warp Gate nerf will not hurt him or turn him into a mere mortal gamer. He will simply adapt and continue crushing other peoples dreams.
There is so much I disagree with about what you wrote. Fast expanding is still risky as a Protoss and you absolutely are "penalized" if you do so against an all in attack or even strong early aggression. If I fast expand against an all in of any race I'm going to lose. Yes, with a single pylon Protoss can warp in units to a battle, but, the warp is not instantaneous and you are still constrained by your economy and number of gateways. It's not as if Terran and Zerg don't have their advantages there too. Terran can double produce several unit types and Zerg can produce massive waves of units thanks to larvae and simultaneous production. Also, with good creep spread you basically warp units in.
Terran can easily keep pace with Zerg and Protoss as far as macro goes. That wasn't Jinro's problem. Had he played a litter safer he could have held off MC's early aggression. I've never seen macro be a problem for a good Terran, especially with MULES.
Jinro got outplayed plain and simple. When he went for a long game macro style MC went for early game pressure. When Jinro went for Thors, MC countered perfectly with DTs. Trying to repair a bunker? Sorry, force fields all over the place. Jinro didn't lose due to imba warpgates. He lost because MC outplayed him every match.