The answer is no. The last couple of years in the MLB off season, 3 teams have made big slashes in the trade and free agent market only to see their teams crash and burn the next season. In 2014 the two teams were the Boston Red Sox and the San Diego Padres. In the 2014 offseason, the Red Sox signed sluggers Pablo Sandoval and Hanley Ramirez, who were the two best position players on the market. Sandoval was fresh off a world series title with his former team the San Francisco giants. Ramirez, a former batting champion was coming off a decent year where he battled injuries. The sox thought these moves would bring them back to their world series form of 2013 but boy were they wrong. Sandoval ate his fat ass to death and had a horrible season by his standards while Ramierez also had a mediocre season, in part because he had to learn an entirely new position that he was not equipped to play. the Red Sox finished last in the American League East and missed the playoffs for a second straight season.
Next is the padres. In the 2014 offseason, they traded for Matt Kemp, Justin Upton, Will Myers and Derek Noris. People were shocked at all the trades they made and at the time even i was convinced that this team might be good. Many of their key players were injured and I'm pretty sure i could've gotten a few hits off their pitching staff. They had an even worst record then the year before and missed the playoffs.
This brings us to the 2015 off season of the Arizona diamond Backs. What the fuck was this team thinking? They sign Zack Greinke to a deal worth over 206 million.. then trade for shelby miller who a 5 year old could've of predicted would be awful this year. Both pitchers haven't pitched up to their potential and have both been on the DL this season. They also made a trade for Jean Segura who's actually having a good year, but other then that this team has been god awful and will most definitely miss the playoffs this season.
The moral of the story is making reckless trades and signings doesn't mean shit unless your team can actually play and fit together. Injuries sometimes play a factor but horrible signings and trades happen way to often and set teams back even more then improving the young players in your farm system. Hopefully no teams make this mistake this coming offseason but i think this trend will continue.