FireEye wrote...
I dunno if it's been discussed before, but for the sake of curiosity, how would you all have written the Kaidan reunion in ME2? Free reign, how would you have fit him (and Ashley, if you want to go there) in? Besides having him as a squadmate? 
Considering that he had to be written out of ME2:
Shep: OMGHAI!!!
Kaidan: But!!! You were dead... or I thought you were. Did you run out on me and make me think you were dead?
Shep: Cerberus science revived me from the dead.
Kaidan: Cerberus >.>
Shep: Yeah. I'm not happy w it either. I tried every official channel I could get my hands on and the best anyone could do was reinstate my Spectre status. I'm watching my back though.
Kaidan: Um... that's a lot to swallow.
Shep: I know, and I don't expect you to believe me right away. I'll forward all files I can to you. Hopefully that'll be enough evidence.
Kaidan: I appreciate that. It's been two years... Anderson wants me to... nevermind.
Shep: I know Cerberus is listening. I'll do what I can to get evidence for the Council while I'm working on this Collector business.
Kaidan: I'm glad you understand. When the mission's over, it'll be different.
And there you go. Since they wanted a troubled middle part to the relationship, how about having them have to hide their relationship from everyone yet? How about a long time without contact where Shepard has to feign ignorance about Kaidan to keep him safe?
I mean, imagine the lonely, brooding nights. But nope, instead we got hurbehdurrrhurrrrr Horizon.