Since the release of the Wrath of the Lich King, the initial rush to roll a Death Knight has come and gone. Many have leveled their free level 55 for a bit then went back to their mains while tons have benched everyone for their new DK. However you fall into the two categories, one thing is for sure; everyone has had an experience with a Death Knight.
   At one time we do not know whether a Death Knight is the new hunt tard. With the ease of availability and thought of being overpowered, many a tard has made their way to managing rune cool downs and trying to tank. Has that put good DK's in a questionable position? We don't think so. In all actuality we found that those outside of the DK community were more oblivious to Death Knight Capabilities then the ones actually playing them. How many of you tanking DK's got asked if you where frost before entering a pug? Was it really a mainstream opinion that tanking Death Knights had to be Frost and that Frost was -the- tanking build?
   But most of the players informed the fact that Death Knights could seriously tank without a shield. It became easier to find our way into groups and raids. Tanking problems still existed though. Many tanks found it hard to get and stay defense capped. Most of the pre-raid gear was from crafted blues that are really high in defense, but low in other avoidance stats. In order for a tanking DK to stay defense capped they usually have to put tier 7 epic upgrades in their bags because the lower defense rating caused them to drop below the cap. Unless you are lucky enough to get your hands on certain pieces of gear, getting and staying capped is a struggle.
  To help the struggle, Blizzard made note that Death Knights would be getting a new tanking runeforge enchant that gives 25 defense skill along with a new tanking sigil that procs a 55 defense rating buff with the release of patch 3.0.8. Note that the runeforge has 25 skill, not 25 rating, which means Death Knights can easily afford to lose 154 points of defense rating via gems and enchants and still stay defense capped. The thought behind it was because Death Knights can't use shields they miss out on a huge opportunity for more defense rating, which has lead to many topics about gemming and enchanting post 3.0.8.
And for Death Knight, target threat has been an issue for tanking. Some have experienced problems with their threat scaling with their raids gear improvements. As the DPS gets better and higher and threat becomes harder and harder in raids
It was announced that a bug with Frost Presence was keeping the skill from properly resetting after a death, meaning when the DK died the presence was removed, but the server thought he still had it. That bug was hotfixed and it was also announced that with 3.0.8 Runestrike would be adjusted to be the proper tanking skill it was meant to be. The damage will be lower and the threat increased, which will make for even easier single target threat.
It's been known for a while that Death Knights could dual wield as well as swing a big two hander and for the most part it was widely accepted that duel wielding was the inferior choice for DPSing. Wrong. Many smart people played around with and stuck with dual wield enough to finally find those right talent choices to make it work. And make it work they did. Now it seems almost all of the high DPS numbers we see today are from the dual runesword wielding Death Knights.
Do you think Blizzard is happy their first hero class, the fabled Death Knight forces people to go DW to DPS? Blizzard will be changing some DW talents to bring DW DPS back in line with two handed DPS. Soon you will get a legitimate choice between one and two handed weapons without gimp your DPS.