No Warp on High Ground HotS

It is a time of turmoil in the realm of StarCraft 2. Players are growing bored of the current and stagnant Wings of Liberty. Yet those lucky enough to be invited into the beta testing of Heart of the Swarm are also uncertain of the future of the game.
Our favorite casters, even, know not the nuances of the game, as it changes on a daily basis.
Yesterday, I saw Husky upload a video talking about how he didn’t know that the battle hellions could be healed by medivacs. Neither did I. And I agree it makes no sense.
But then, just this morning, HD StarCraft uploaded a video and made a mistake he didn’t even know about. He said he didn’t know why this player didn’t just warp in a pilon on the low ground and, with vision, warp onto the high ground.
Now I know HD plays as toss and all. But there are some who would say that he doesn’t really play at all. I mean, even I knew that you can’t warp units into the high ground in HotS. The reason why, while not readily apparent, is easy enough to understand.
In HotS, maps have become larger. The trend is going towards macro style play. Meaning everyone’s base has more ground to cover. Add to that the mothership core, a flying unit that toss can get extremely early in the game, and you’re setting up a recipe for disaster. And by disaster I mean, a new era of 4gate type rushes.
Before, pulling off such a trick required a hallucination, or a Stargate and flying unit, or running a unit into the base for vision on the high ground.
Now, with a mothership core, you basically just need the pylon, and the rest of the attack comes for free. This acts as a multiplier effect for the most powerful spell in the early game, the forcefield. So, although it seems like an elaborate and unimportant rule change, I can understand why blizzard came to change it. Though I haven’t tested it myself, in theory, a warp prism would still do the trick.
I want to say for the record, that I just think it’s sad that I happen to know more about the nuances of the game than my favorite casters. But what makes it even worse is that my favorite casters are still way better than me, if it ever came down to a 1 on 1. Do you hear me HD and Husky? I’ll take you on any time, any where!