1. How is the game rushed? If you play wall knight vs gargantuan smash, the game could go to turn 20 (yes, I had several turn 20+ game). Most game goes beyond turn 10. If you look to end game early with a pet combo zombie deck, or pineclone doomshroom deck, then of course the game is going to end early, just like midrange shaman vs zoo.
2. You can't even compare this game to hearthstone because the mechanics are not even close to similar. This will affect the gameplay, as well as what card does what. The mechanic they implemented in PvZ heroes makes the game shorter (because that's what they want), but these are two CCG that are so different I don't see a way to directly compare any part of it. There is no summoning sickness, everything is laned in PvZ H, and you can't free attack etc etc.
3. IMO, the really top tier quality decks right now are all late game oriented, with chompzilla, smash, doctor brainstorm, wall knight etc. There are only a few ways to do anything significant, and most late game decks have enough healing/removal to survive. I wouldn't say PvZ Heroes is all about early game, there are just not enough quality early game cards.
