I think power creep is a real problem at the moment. If we were to use paper MTG an a parallel, it feels to me like we’re somewhere in the middle of Urza’s block right now.
4/4 creatures are a really good example, because it really, really looks as if they’re just being made 1 mana cheaper with every expansion just so that it’s easy for players to see that they’re an upgrade for their decks. We now have the 4 mana Devil’s Playground, which is brutally efficient and has a huge upside which gives it the capability to kill 2 creatures in combat, or allow it to be sacrificed for a big advantage.
There’s quite an obvious trend in 6 power creatures too. A while ago Skysnare Spider’s mana cost was increased from 12 to 16. To this day I have no idea why; Soulblade Djinn was allowed to stay at 12 mana for a 6/5. Then along came the 6/6 Akoum Hellkite for 12, 6/6 Hanweir Captain for 12, 6/6 Nephalia Moondrakes for 11, and now we see the 6/5 Selfless Spirit for 10 and 6/5 Docent of Perfection for 9. All at rare.
These trends are very easy to spot, and can’t go on indefinitely. We can debate whether or not a 0 mana 4/4 will be any good in the Platinum meta game… it may not be. But it will certainly render huge swathes of cards utterly unplayable by comparison. Why on earth, 3 blocks in, new 6 mana 2/2s are still being made is beyond me. Who on earth are they for?
However there are far, far worse problems happening with power creep that are more difficult to quantify because the cards involved are less obviously comparable, even tho it’s pretty easy to tell they’re OP.
The (only) card I will be talking about today is Behold the Beyond. The fact that I could go into the Emrakul’s Corruption event with 2 bad cards in my deck, maintain control of games indefinitely, and not lose a single game, even against decks which were not built around this restriction, should really set some alarm bells ringing. If the deck posted in this thread
https://forums.505go.com/discussion/53582
is that good when 20% of its cards I’d tear up and never play again if I got the chance, then how good is it the rest of the time?
Behold the Beyond is far from the only offender. There are a lot of cards out there right now which are so powerful they allow the players with the largest collections to do whatever the hell they want, all the time. I’ve got some of them, I haven’t got others. Behold the Beyond I do own.
However I think what happened to Kiora gave us all a fright. No-one was expecting Kiora to be nerfed.. and I, for one, was certainly not expecting her to be significantly un-nerfed almost immediately as a result of player feedback. It seems very unlikely that the rapid changes to Kiora were made as a result of playtesting or data gathering. This has made me particularly nervous of calling for specific cards to be scaled back in power… if I make a strong case for any of my own cards to be nerfed and it happens while the rest of the field is left at full strength, I’m not going to be able to compete any more. But my own cards are the ones I can talk more authoritatively on. On the other hand if there’s no credible way I can call for the reining in of a subset of cards which I consider to be overpowered (which intersect to a greater or lesser degree with my own collection) without rightly being accused of bias.
Furthermore I’d add that the open sharing of information is in nobody’s best interest any more now that the system of coalitions is in place. If I discover an extreme way to exploit a card or planeswalker, I no longer come onto the forums and complain that it’s OP… I just tell the rest of my coalition about it and we’ll use it to win better prizes (Disclaimer: Many members of my coaltion are a lot nicer than me 
) It’s even possible there are people out there deliberately exploiting bugs instead of reporting them. The posts about Emrakul’s Corruption on the forums gave a good example of the lack of free flow of information; I posted my deck for the black node to attempt to promote discussion, but there was almost none. I can’t blame anyone for not wanting to give away their winning tech. I didn’t really want to do it myself. I certainly wouldn’t have revealed new decks built with cards from a brand new expansion.
Where does this mean the game is going? Well the ties for 1st place with perfect scores in Nodes of Power are getting bigger and bigger every time. That’s not a good sign. Players who never lose are looking at stagnation, boredom, and then maybe leaving MPQ and finding a different game to play.
Say it with me now: ‘Magic Puzzle Quest is dying’.