The only thing I play in this is Path of Champions as well.
Just last week I thought to myself “I would actually pay for a properly done version” (no lootboxes/cardpacks, single buy expansion deal) and wondered what they have planned for the mode.
I watched their roadmap video and apparently Path of Champions makes up over half of the total players/playtime for the game now.
After the complete rework and re-release of the mode in November last year that success made them decide to rework and expand it again. Releasing sometime this month is the next version, with more options, more strategy and more decisions (also completely reworking the progression, setting everything to zero again).
Kind of odd that the janky Slay the Spire inspired mode overtook the base Hearthstone competitor so easily. Not using some fundamental “features” of the base game and genre like card packs, card collection and pvp focus might have helped make the good groundwork like card design, turn mechanics and art design shine more.