DLC - It really depends on the game, Fallout DLC is usually excellent and worth every penny whilst other games completely rip off the consumer.
Pricing - If anything it's got slightly cheaper in Australia, a lot of new games are >$100 which is good and there are plently of cheap older titles too.
Multiplatform - I can somewhat agree, more exclusives the better, but I'm glad some games are multiplat so more people can enjoy them.
Suquel-itis - This is only really prominent in a few franchises, many others only have 1-2 sequels. There are still enough standalone games out there for me to not be bothered by the increase of sequels.
1st Person Stir Crazy - First person shooters have overrun the market quite a bit, I don't hate the camera view but far too many fps games feel generic and lackluster with occasional excpetions like Bioshock or Borderlands;.
Patches- The ability to patch content easily is a bonus because it allows bugs to be fixed and new content to be added, but the issue you highlighted is troublesome and allows some games to be realeased before they are propery finished.
Focus on Online - Yes, sadly multiplayer often takes front seat and allows devs to neglect the singleplayer and leave the game with a 6 hour campaign with no replayability, in other cases we see multiplayer tacked on to games that don't need it. Nothing beats a great singleplayer experience in my eyes.
Studios Dropping like flies - It's such a shame really, but with developent costs for AAA titles ever increasing and corpoate control of the gaming industry expect to see this continue.