Spider-Man being married, Superman being married, Barry Allen AND Wally West being married, etc...readers didn't demand that. That was what these companies did, with no input from the readership. The stories would be good or bad based on the content, not their marital status. It's neither restrictive or helpful.
As for Batwoman itself...as always, I feel badly for the readers who don't get to have creators they support finish their run the way they wanted. That's the worst thing, I feel, for how DC does their business.
It's always been that way -- creators don't always stay to finish their planned arcs/runs. I'm not saying this is new. But it's just unfortunate, because in this medium now, you really are bound to series because of decompression and arcs that usually are six issues and usually no less than four. DC...some days, it seems like creators can't get out of there fast enough.
Tough for the fans of these books.
*Sniff, sniff* "Damn it, Diana...If I'd known they would trade us in for a JT Krul-written Captain Atom and "The Savage Hawkman," I'd have let Superboy-Prime destroy all reality.""Superman flies and is really strong...what the fuck else do you need to know?!"
-- Hitler, expressing his displeasure about DC rebooting and complaints about continuity