Ya know, Tai and Dora hooking up and Marten either giving the seal of approval/not really caring would piss me off for a couple of reasons.
1) I really really don't like the Tai/Dora pairing.
2) Dora has spent the last few comics she's been in being pretty chill, relaxed, and reserved. That's the Dora I really liked... her going back into a hook-up/relationship so soon would mean we're back to Dora's Relationship Issues, even if it's only her getting over them. But come on... dating Marten's boss? Even for someone who is getting to a good place with therapy, this would be a recipe for falling right back off the wagon.
3) I'm glad to see Marten resilient and all, and I certainly am glad to see no whining or drunk JerkAss.... but sometimes it seems like he got over the stage moved on pretty damn fast. Granted, hard to tell strip time, but I'm gathering maybe a few weeks? A month? And even moving on to the point where he can check out other girls and be friendly with Dora, for him to just say "cool whatever" to his boss hooking up with his ex suggest either a huge passage of time, or that he didn't really care in the first place. If you really cared and valued your relationship with an ex, shouldn't some residue of those feelings still be there in the time frame we're talking about?
I say this preparing to get flamed, but it always bothered me that Dora seemed to bare the brunt of the blame for the break-up with her issues, and yet... did Marten really demonstrate very strongly that he cared about her? Sure he liked her, but his love seemed to be of the passive, "why not?" variety. He didn't appear anywhere near as into her as he was with Faye, and it seems that post break-up, he got drunk one night, was kind of a jerk for one day, and then boom, over it.