They should have cards in HS that you can double click on to activate their ability for mana cost (or some other cost). I guess that's what Inspire was for but sometimes you just don't want to use hero power. Most other card games already do this (hell some card games have multiple effects like these on a single card).
There's not much limit into what can be implemented but it boils down to how complex Blizzard wants to make the game and they simply don't so they just continue to make cards that do stuff just by playing them or leave the decision making to the game rather than the player (ie. RNG). Most other card games allow you to pick cards you want to discard or pick cards you want to resurrect, not in HS.
They should keep making cards that make use of the digital aspect to differentiate from the TCGs. That's where the potential is. Unfortunately for Blizzard, that just means making more random cards that pull random stuff out of the ether that you can't play around (ie. Unstable Portal).
There's not much limit into what can be implemented but it boils down to how complex Blizzard wants to make the game and they simply don't so they just continue to make cards that do stuff just by playing them or leave the decision making to the game rather than the player (ie. RNG). Most other card games allow you to pick cards you want to discard or pick cards you want to resurrect, not in HS.
They should keep making cards that make use of the digital aspect to differentiate from the TCGs. That's where the potential is. Unfortunately for Blizzard, that just means making more random cards that pull random stuff out of the ether that you can't play around (ie. Unstable Portal).