Thinking on this more, I'm convinced. Since my ship isn't equipped for combat (it's only outfitted with the Extendo-Matic Hand of Friend-Ship), I've got the best pitch. Kreisberg can eat his heart out, these are the kind of marital problems Ollie and Dinah would really face!
THREE'S A CROWD part 1 of 3 "Ollie's committment to activism is called into question when Dinah challenges his views on monogamy! Will he fall back into his old hypocrisy, or will he put his money where his mouth is and learn to share Dinah? Guest-starring Oracle in an exciting new arc!"
part 1 is Ollie deciding he's not really big enough a guy to share her, so he cuts her lose until he feels he's ready for the kind of relationship Dinah is after part 2 is Dinah being broken up over Ollie leaving, and Babs not wanting to have her all to herself if it isn't going to make her happy, so [something happens to make this fill a whole issue]. part 3 is Babs tracking Ollie down and the two of them reaching the uneasy agreement that Dinah is what's important so they will both love her because she loves them both
Once the arc is over GREEN ARROW/BLACK CANARY changes its name to BIRDS OF A FEATHER, starring the three of them. Babs and Ollie are still competitive for Dinah's attention and a little jealous, but eventually warm up to each other and they're all a big happy family along with Sin because we retconned that goddamn mess somehow! What do you think, is it too much?