I got a bit bored and fancied some multiplayer co-op, so I fired up Mass Effect 3 online again, for the first time in almost 2 years. All the frustration is back

Slogging away just to be able to open a random pack, that then has none of the items you wanted in it!
I have to say though, the developers have done a great job with extra content. I stopped playing multiplayer early-ish on, and now there's tons of extra characters- pretty much every race and ability you can think of is there, as well as extra weapons and mods, and It's all free!
Still one of the best multiplayer experiences out there imo, when it's not laggy, which is pretty good considering it was thought of as more of an afterthought to the main game when it was first released.