Eternal: As above, base game design is flawed; no mana screw/flood protection.
The opening hand is guaranteed to have some Ressource cards and non-ressource cards from pretty much every game I have played so far. Though yeah there is some risk of repeatedly drawing ressources or no ressources afterwards. Or drawing one type of ressource card and another type of playable cards.
Personally I don't mind the occasional mana screw/flodd since in the end it evens out anyway. There are many cards that give ressources or let you search the deck for this or that to help with screw/flood to a degree. Though yeah, everyone gets that occasional loss because they just kept drawing the wrong. (Though that is far from limited to games with ressource cards. Inb4 annoyed memory of the times where you didn't draw the things that could save you.)
I do have to say that I also played the MtG Duels of the Planeswalker games and became rather fond of the series. So maybe that caused me to have less problems with this than others may have.
Though there was apparently an event sometime recently where they had everyone draw 2 cards per turn which helped a lot with the problem from what I heard. There is some whispering that maybe they will implement that fully in the future.
There is also Catamancer, a mobile CCG I plan to try out sometime. Kinda silly but amusing concept, with all cards being cat based. Either pure cat or some weird cat-hybrid, like cat-owls, cat-devils and cat-Cthulhu.