I agree with you. The Cowboys got out of a Cards td or safety just because Romo's arm was (barely it seemed) going forward. Doesn't seem right. That's what this Tuck rule does, sadly.
Throughout this game I was frequently amazed at how many times when just as the Cards made a big play something would happen to negate it. Penalty flags, the refs overturning the call after reviewing, and then at the end of the 4th qtr when Dallas had to kick a 57 yd field goal - then they gave what was it an unsportsmanlike penalty or something? - and it was suddenly a 52 yd fg. I shouted out loud "This is such BS!" because I hate the Cowgirls and was so frustrated how every call seems to go their way. And then the fg was blocked but the coach had called a timeout so the Cowboys got to rekick and then made the fg - AGGGH!!!
But despite those frustrations, the Cards still managed to win in spite of the refs and in spite of the tuck rule and in spite of themselves!
Dallas won the toss and I said to myself, "Now Dallas is going to win in OT, dangit". But then they went three and out and then that blocked punt returned for a TD by our own Monty Beisel!!