Are the Lightning experiencing a Stanley Cup finals hangover?

The Lightning took the Blackhawks to six games in the 2015 Stanley Cup finals, but have gotten off to a mediocre start this season. Bruce Bennett/Getty Images

In 2014-15, the Tampa Bay Lightning won 50 games for the first time in franchise history, before fighting their way into the Stanley Cup finals for the first time in over a decade, and dispatching strong Original Six teams Detroit, Montreal and the New York Rangers along the way.

Fast forward a few months, and that same strong Lightning team is off to a lackluster 7-8-2 record so far in 2015-16. Is this just a Stanley Cup finals hangover, or is there something fundamentally wrong with the Bolts?