Lets keep it down through, the game has been rescheduled to Thursday 27th March, so it isn't far again infact that's a week from today. Even if Osasuna still manages to beat Barca, they are still ahead and don't forget, that was the same way Atletico Madrid beat Barcelona 2 -1 in the first leg. Just last week, we saw how Atletico Madrid were already winning 2 - 0 and with few minutes left to 90 minutes, they conceded 4 goals at a stretch. That should tell you that this team isn't actually joking, them seem to want it all this time around. Real Madrid on the other hand is inconsistent in the league and definitely can't be trusted.
But either ways, if any of them wins it, it's still ok but I think I trust Barcelona more.
If I were to choose any team to be the winner of La Liga, it'd be Barcelona. They have shown more consistency than any other team in the league. They have played and won more convincingly too. Madrid manages to win games so far this season, they get outplayed by a lot of teams in La Liga. The presence of individual players is what is keeping Madrid alive in the league. The drop in form by Barcelona in November and December is another thing that keeps the league wide open.
Atletico Madrid will always be there but they have blown their chance of winning the league when they lost to Espanol and Barcelona. So now all they will be praying for is for Barcelona to lose against Osasuna which might not happen without Zaragoza.
Also, when Madrid and Barcelona meet in the league for the second leg, I think Barcelona will win them again. Except the rivalry spirit takes over and Madrid plays like they do in their peak, they're not taking all 3 points away from that game.