So I have been with Pocket since BETA release due to being located in NZ.
Here are my thoughts overall on Pocket.
The AI challenges are fun, as you progress, you can improve your decks to complete challenges; however, it's hard getting cards you need and eventually the challenges run out and you are left with nothing.
Pack openings are slogfests after around the two week mark, especially with all challenges completed. You seldom get many GOOD cards you want, and your only real source is from Wonderpicks which will more often than not give you nothing.
The shiny dust accessories are too difficult to get, you need to have over 2 of a special card before you can trade in for currency which means you need to focus on 1 type of booster pack to increase your odds which is against the concept of collecting.
My recommendations are...
A) Allow you to pick your wanted card with Wonderpick, make it costs more Wonderpick currency.
B) Let us trade in cards for the currency used to buy specific cards, you can't do much with your current duplicates and even if you could trade who in the heck is going to trade basic cards for higher rarity ones when you can't do anything with them.
C) Increase the hourglass rate or allow us to stack more than 2 packs from simply waiting, let us get up to 10 packs from waiting that way we can open 10 at a time and be somewhat excited by what we could get.
D) Reset challenges weekly for rewards.
E) Give people an EX reward for completing a challenge to make it easier for people to improve their decks.