This might still be a strategy to get him resigned, However, It is a good thing that he resigned the job than to get sacked by the Barcelona management board ,However, in my opinion Xavi stay at Barcelona hasn't yielded much of result so far, that is to try to bring back Barcelona to its usual glory, therefore it is right time they give another manager chance to try to fix things up with the Barcelona team.
Xavi probably still wants to try to make Barcelona good again and have lots of wins to be had. Until now, you saw that Barcelona managed to get a win against Las Palmas, and they managed to survive to secure their position in second place on the standings. Hopefully, in the next match, Barcelona can win again so that it will not undermine Xavi's credibility as Barcelona coach.