Now that we have guild levels how about guild rankings? It would go a long ways towards weeding out all the defunct guilds and giving both older players a new form of competition and newer players a better way to find a healthy, active guild.
It seems silly that even the more difficult raids don't have the upgraded versions of cards. Automatically adjusting the raid card pools when new batches of card upgrades are released is a would be a nice improvement.
One place to begin would be to make the king's bounty equipment significantly stronger. I know saving up eventually pays off, but seriously for 10,000 AP we should be getting something way better even if we arn't forking over cash.
How about instead of pushing mission energy costs through the roof they try hiring a writer who can produce a longer storyline for updates that doesn't sound like it was stolen from a twelve year old's twitter feed?
"Hurry! If we get underground we can avoid the shockwave!" Umm... Dear Tyrant, this is not how shockwaves work, hiding underground from earthquake = invading Russia in the winter. All the characters should now be dead.
How about an overall map? It would make it easier to jump from area to area and might begin to give the plot even a semblance of cohesion. Right now you never know where you are, how you got there, or why you're there.
 "Dawn of the Dragons")
 "Tyrant")