This post addresses my second question:
On card making and balancing heroes: I know that you have data to keep track on how frequent each hero is used in ranked matches. Based on that, the dev team is trying to balance heroes out by introducing new cards. The smash and zmech maybe good for low tier plays but they are never top tier heroes because of their combinations of classes. Here's my opinions on that, I hope you will develop cards that could surmount these elemental weakness of them based on my opinions.
The smash:
First let me address why it is good for low tier players. The smash is a minion heavy hero and his minions have the best stats out of all classes. Low tier plays only tempo decks and they only know throwing all brains at minion phase. The good stats of minions wins match up with plants hence one card usually trades with 2 or more cards from the plant side. However, The problem of smash in top tier players is, 1) his minions have to be played before plants and most are not hidden in gravestones. That's why they are always frozen or removed by freeze decks or control decks. This makes the smash not a top tier hero
After millions of testing, I find that the smash tempo garg gargologist deck does not work. Not even stable in ultimate rank.
This applies to energy drink zombie too.
2) smash has no card draw. Once he matches with control removal solar flare, he could never sustain in very late games
For zmech:
The problem of zmech is even more severe. Zmech not being possible to have top tier decks built is that
1 no hard removal
2 water lane weakness
3 no card draws
4 most minions are played before plants and not protected by gravestone so are easily controlled/removed
so it's weak against freeze, control solar flare, mega grow water lane...ie. literally all plant heroes
NOT on the gargs. Defensive end? Gargologist? The provided weaknesses are basic things for zmech to deal with. PopCapGames haven't dealt with those, let alone repeat moss! Bonus track? Neither could really deal with it's weaknesses or buff zmech. Popcap, wake up!