If you recall, the GM had failed to re-sign Alexander Radulov, who had just had a very good season. Feeling the pressure, Bergevin made this trade, hoping that Drouin would become a star in Montreal. Several years later, we still regret this trade.
The issue in Tampa is related to the salary cap, and Sergachev commands a high salary. With Victor Hedman and Ryan McDonagh also on the left side, Tampa's defense is very strong.
Indeed, with Steven Stamkos potentially exploring the trade market and the Canadiens possibly being very interested, this salary savings changes the situation in Tampa Bay.