No, they're not. And that doesn't mean anything.
CBS also airs sports on the weekends that overrun or outright preempt the broadcast. (actually, all of them do at times) That's why they chose the news to be taped; what point is there to go live when you barely have time to produce few stories when the match ends? If there ever was breaking news, they would've broke in at any time (or else, just go online instead [they have a network there you know]).
Giving up would be cancelling the weekend news and let the sports play on until completion (which also makes money, not that that's a problem). Just because they just recently changed to a taped format and won't usually go in the field, doesn't mean they can't afford to do otherwise.
And speaking of shared studio, where is ABC when a special report is on the air? In THEIR shared studio? What's your point?
(...oh, and using my personal first name against me because i don't share an opinion with you (or whatever creepy reason) isn't gonna ruin me, bro.)