IMO, the OT/Shoot out are symptoms of the actual illness, which is that more than (IIRC) 60% of games end regulation in a tie.
This is why I think the 3-point system should be tried.
Also all sorts of other 'crazy' things...Like reducing goalie pads, blocker widths, stick widths. Having a long change in the 1st & 2nd periods. etc
Get more games to end in regulation, and the entire OT/SO thing is vastly dimished