Atletico Madrid is not the title race. They're so inconsistent, and have no DNA to win the title. So i remove them. So i have only Barcelona / Real Madrid to win the title. 
Gamblers are now only having Madrid / Barcelona to bet on winning the title, which much easier than before. I wonder why you called it not nice for gamblers. As far as i know, La liga has been the easist league to predict the winner after Bundesliga.
Atletico Madrid are still contenders of the La Liga title. The difference between the two top clubs and the Diego Someone side is just four points. Atletico can take advantage of Barcelona and Real Madrid in any game. The league still have more games to play, so all the top three teams have almost the same opportunity to win the trophy. Both Barcelona and Real Madrid are still playing in the UEFA which might affect their performance since they will play more games. Atletico can use the opportunity and gain more points..Gamblers are now only having Madrid / Barcelona to bet on winning the title, which much easier than before. I wonder why you called it not nice for gamblers. As far as i know, La liga has been the easist league to predict the winner after Bundesliga.