What this with Giratina EX taking three turns to set up? Either you run M Sceptile to power it up or run 8 special energies and cycle through with Unowns and Shaymin.
The biggest problem is still the speed, vilepume protects you from hammers, but the biggest problem by far is two supporters: Lysandre and Xerosic
If they get to use Xerosic multiple times they'll utterly destroy your energy resource, if they Lysandre your vileplume up you're going to have a lot of trouble getting that thing out of there unless you have one of the two or three AZs in you hand right there and then.
The Giratina train has been quite a ride, it's been going back and forth from mega-hype to "its a collectors items", I think the people who are overhyping it does tend to go a little overboard (me included), but to disregard the card altogether is straight up ignorant with how powerful locking so many things is, and having a safeguard like ability on top, even with Garbador in expanded, and Hex Maniac on the rise is still a huge thing.
Not too long of a wait, we'll see in not too long. I'll never forget the comments regarding "Seismitoad does way to little damage to be used competitively".