The progression system seems like a pointless endless loop It seems like the rune system works like this:

* Get points by playing matches

* Spend points on backpacks

* Backpacks drop runes

* Completing runes gives more points

* Spend points on more backpacks to get more runes

It's an endless loop and it seems like there's no end goal or any point to it. There are those shaders sure, but to use myself as an example, I only play duel and sacrifice 

So when one of my runes is "win 10 FFAs" I know I'm never going to get it. So the end goal is removed from the equation and all I have to look forward to is the endless loop of get points to get backpacks to get points to get backpacks

The progression system doesn't matter much to me, but it will be important for new players who aren't long time quakers and who need something to latch onto and goals to strive for in the game 