I don't like using Twitter myself, otherwise I'd reply to him on Twitter, so instead I'll write this here and hopefully he sees this.
I was one of the many Ret Paladins who complained about too much RNG back in Cataclysm. Yes, I was one of those Ret Paladins.
But if you look up my Guild (plus its sister one on The Scryers (US)), you'll notice something. Every single Paladin has Divine Purpose selected.
Why would I do that when I complained about RNG, you ask?
Cataclysm Ret and Mists Ret are two completely different animals. Divine Purpose ITSELF has changed, too!
In Cataclysm, Ret Paladins had Divine Purpose baseline. It once proc'd off of:
Hammer of Wrath (I think?)
Divine Storm (? Not sure if this proc'd it or not)
Now, Divine Purpose procs off of only World of Glory, Templar's Verdict, Divine Storm and Inquisition.
Also, Holy Power gain is much faster in Mists of Pandaria, than it was back in Cataclysm.
Why did we complain about Divine Purpose back in Cataclysm, but yet think it is OK in Mists? Well, it is very simple.
Back then, Ret Paladins had...
1). Avenging Wrath.
2). Guardian of Ancient Kings.
#3 and #4 cost Holy Power to use (Zealotry required 3 after a patch/hotfix). Already, this makes the class very complicated, WITHOUT any RNG at all. You had to keep track of all of these cooldowns and timers, Holy Power generation was slow compared to now.
However, take a COMPLICATED class and add in Divine Purpose, which COULD proc off of any of your basic attacks. In some battles this was awesome! You did ridiculously good DPS. However, when the RNG decided that you were not going to be king of the DPS meters today, you did ridiculously LOW DPS or anything in-between.
So we had an over-complicated class with lots of timers, COMBINED with the huge RNG factor of Divine Purpose.
Now in Mists of Pandaria....
1). Zealotry is now a Talent with a Cooldown that does not require Holy Power.
2). Inquisition is still there (unfortunately. Could you guys please get rid of this and build the damage into the other abilities, baseline? kthx).
3). Avenging Wrath is still there (and I think it is fine IMO). You can even take a talent to buff it.
4). Exorcism is always instant cast with a small chance for its cooldown to be immediately finished. (MUCH better than Cata's model!!)
5). No Guardian of Ancient Kings for Ret anymore? At least if we have it I can't find it in my spellbook...
6). As mentioned before, Divine Purpose procs off of finishers, not builders.
All of this stuff combined, makes Ret a lot less complicated than it was back in Cataclysm. I don't mind Divine Purpose and its RNG when it has a MUCH LESS impact on my DPS. When I get a proc, that's awesome! If I don't, I don't mind because at least now, it doesn't take 30 seconds+ to build 3 holy power like it did before. Also, Art of War is no longer anywhere near as important as it was back in Cataclysm.
That is why, if you made Divine Purpose baseline now, I don't think people would mind it so much.
The reason why we hated Divine Purpose (IMO) back in Cataclysm, was because you were taking something that was already complicated as all crap, AND you added RNG to that mess, AND said RNG was a very BIG factor in our DPS. Now that Divine Purpose is nowhere near as powerful or important as it was before, it won't make-or-break our DPS and doesn't make the class feel so dang complicated.