as an old kong player (i played back when the badges were first put in this game... got bored of grinding, came back less than a week ago)... i definitely agree with the grinding part. its boring, adds no value to the game.
and as a tyrant player... it's had new patches every month or so. new cards, factions, raids.
in the time i've gone, they added the cards in the development section.
take it with a grain of salt but tyrant has had alot more development time because the micropayment "warbond" system is effective at generating funding.