They made the right decision at the time: take the known quantity. So long as that pick doesn't end up being Hughes or Kakko, the Sens got the better player. You could argue that Tkachuk vs Cozens/Dach is a wash.

are they gonna trade for matthew Tkachuk so they can do what Carolina did with both staals or what vancouver did with sedin twins or what vancouver is gonna do with quin hughes and jack hughes?

No guarantee its even Hughes, you guys might still suck next year and can try to get Lafrienere

There's data that supports going out of one's way to employ brothers on the same team leads to the team itself not faring as well as those that don't. The Sedins are one of a few exceptions to this rule.

Also, what would Ottawa be able to trade in order to acquire Matt? They have very limited resources as it stands and are in the early stages of a rebuild. Best thing Dorion could do right now is ship out everything and anything with value and just start it all over again. Use the brinks truck of cap space next season to bring in dead contracts and outbid marque free agents.