And make them earnable only from brawling - but speed up how quickly it is possible to build a deck from brawling. It took long when first released - which is why they likely brought merits for everyone.
Yes, I like this idea. Perhaps target being able to max them in 1-2 years, they could correspond with each new reward set. Include a way to get them either only from brawls or you get a multiplier from brawls compared to other game modes.
Something like this. Would also be interesting to tie a mechanism to SPS-HIVE holdings too, like a multiplier for ranked to encourage people to have both.
Since they already have a mechanism for rewarding players for staking more SPS. They could add a secondary multiplier which multiplies that by your HIVE power. For example this is what mine looks like. So they can just add another multiplier line based on HP.