Borderlands
Borderlands: The Pre-Sequel
Super Mega Baseball: Extra Innings
Valiant Hearts : The Great War
SoulCalibur
Metal Gear Rising: Revengeance
DOOM 3 BFG Edition
FINAL FANTASY IX
Half Life 2: Episode 1
Half Life 2: Episode 2
The Talos Principle
Broken Age
Portal
Goat Simulator
I could go on, but if Hearthstone is the only "professional-grade" game that you can name on Android then you clearly haven't even bothered to look.Portal and the Talos Principle do seem to be on there, but only for specific Nvidia chipsets.
And calling Hearthstone "professional-grade" is a pretty big stretch as well.
Goat simulator is far from professional grade (on purpose).
It's not P2W, but there is a "Pay 2 have an marginal edge" factor (you can buy better components and ammo with in-game money, and you don't earn enough in-game money through regular play to use all the better ammo all the time).
The devs are pretty good about maintaining a good in-game economy - they actually just upped the amount of in-game you earn in response to some new features that were costing to much.
That IS what P2W means.
But consider all of the great games that are ported natively to Android. Several Final Fantasy games, Chrono Trigger (my personal favorite). If the keyboard mapping is solid, that could be a really big deal. I know I'm in opinion territory here, but I'm pretty excited. Your question is fair though.
I believe redstone for example is now available in the Pocket/Console editions.
The third party ecosystem is not well developed yet, and Mojang doesn't seem to be caring. Hypixel (perhaps the largest multiplayer server) started and shut down a massive (thousands of simultaneous players) PE server b/c it just isn't there yet.