Heh, i havent been here for ages, but decided to see what people thought of Citadel and saw this thread, figured i would participate.
1) I came to terms with the ending fairly quickly when it was released. Never actually believed any DLC would be able to fix the issues with the ending. The ending suffered from a thematic change that didnt fit, it was completely out of character and most importantly, it was poorly written. The first two are arguable, but the third is hard to argue. The fact that an EC was needed in order to address the more superficial plot holes in the ending attests to this.
2) The ending forced me to look at the entire ME3 experience as a whole and made me realize a few things. While thinking about the game, i realized my entire experience in ME3 was seen through rose colored glasses, i chose to ignore the fact it was a poor port to PC, the combat mechanics were rather disappointing, customization was nearly non existent and the thought out side quests were simply not there, many of the RPG elements i liked from the first two games were simply not there. While i dont regret buying ME3, i do regret buying it at release and paying as much as I paid for the game. I dont believe the game was worth what i paid for it.
3) Am i still mad, not really, i am more apathetic towards ME3, i have not bought any of the DLC and have no interest in the multiplayer. I have only played Citadel at friend's and quite simply, while it was a nice touch, i found it to hardly be relevant when it came to the overall problems with the ending. Can i enjoy it? I uninstalled it after I finished it and never installed it again, so can i enjoy it? I dont know, what i do know is i dont care to try.
4) The EC and Citadel had no bearing on my opinion of the ending, the only thing EC showed me was that when they were writing the ending, they ignored aspects of their own lore, and that it was done in a hurry. Citadel and EC to me were more of an effort to say, we did something, why are people complaining.
What i learned the most about the whole ME3 situation was how Bioware and Electronic Arts treat their customers. Quite frankly, i have no interest in doing business with either of these companies based on faith ever again. I used to preorder pretty much every bioware game, and many, many EA games, that is something that ended after i saw the reaction from both companies. I will not refuse to buy an EA game, that is rather childish, but i wont preorder based on faith, which to be honest has already paid off. A year ago i would have preordered Sim City, Dead Space and Crysis 3. Those are 3 games i am glad to say i did not pre order nor did i bother to buy.
Will I buy ME4 on release? no, I will wait a few weeks and see what happens, if the gamer reaction to the game is favorable, i will buy it a few weeks down the line. If the gamer reaction is not favorable, like the last 3 releases from Bioware, i will not and I will move on.