Not sure where you guys are on unlocking all cards but I had some interesting results after using spirolone's unlocking patch on Kaladesh.
So it seems the patch works partially. Doesn't unlock everything but does unlock more cards then my online profile has. Since I applied the patch to a copy of my real online profile this did give me more cards to work with. The puzzling thing is the fact that as far as I can tell there is no pattern to what unlocked and what did not. With the patch applied to my profile it unlocked 764 cards. Before the profile was patched I only actually own a little over 400 cards legit. The cards that remain locked seemed to be random to me. The majority were cards from SoI, but there were locked cards from all the sets too. There were also unlocked cards from every set so, like I said a bit random looking. Maybe if I stared at it a bit more I could decipher a pattern.
Here is the REAL
Shocker!
The card count on a lot of the Mythic Rare cards was off. I had 2,3 and sometimes even 4 copies of Mythic Rares in my collection. This is impossible in the normal version of the game! Just to make sure it actually was multiple copies of the card I made a test deck. Sure enough I was able to make a deck with multiple copies of all these Mythic Rares.
Not sure if Spirlone's patch has always been able to do that but I've never seen it mentioned in the forums. I have to say it's a pretty cool option to make a deck with more then one copy of a mythic rare and I hope that it becomes a regular feature of any modding you guys do in the future.