I'm in support of your statement too, Mauricio Pochettino might not had given them a trophy this season or got them to the top 4 spot but come to think of it, it was his first season in charge of the club and he encountered some challenges of which injuries was one of the major setback from the beginning of the season, if you noticed Manchester united still suffered same injury crisis and it really affected their gameplay but then they won the FA to justify their poor record. Well Pochettino might not had won any trophy but his gameplay changed when most of his players returned from a long injury spell and both manager and payers were beginning to have a mutual understanding on and off the pitch which made them to play wonderful football nobody expected and secured a spot in an European Competition, that's something the board should've considered, I think it's worth a second chance. I'm not going to say Chelsea would regret sacking him cause their new coach might suprise everyone but Pochettino deserved a second chance. How long would they go on trying different coaches? I think they need a coach with a vision, and then support him to do better. I bet they'll still sack Enzo Maresca if he fails to deliver in the upcoming season.