Good question - and people will have different opinions on this. As much as I absolutely loved the Stanley Cup Finals run, we all knew in the back of our minds this had the potential to be 'short-term gain/long-term pain'.
If we are in serious trouble in 3-5 years because of the lack of draft picks turning into NHL'ers at that time, some people will say the Finals run back in 2014 was the worst thing that could happen because we didn't win the Cup, and we are still paying for those trades. Others will say it was all worth it for a Stanley Cup Finals run, which may not have happened if we didn't make those trades.
A lot had to go right for us to make it to the Finals, and it did, and I still believe we were ripped off with that goaltender interference non-call that, IMHO, turned the series.
That said, with all the trades Sather made he did not make us perennial Stanley Cup contenders, he made us a team that, next year, will once again need a lot to go right for us to make the Finals. And with the roster turnover because Sather is up against the salary cap, some key contributors will not be around next year - so there is a chance even more will have to go right for us in 2015.
That may happen again...and it may not. So were the trades worth it? YMMV.