I know people like to talk about relocation, but if you're going to do so, you should be serious. It isn't an accident where they put NHL teams. In order for Ottawa to ever even consider being moved, there has to be a better market available. For Canada, here is the population centers by population:
# 1. Toronto.
# 2. Montreal.
# 3. Vancouver
# 4. Calgary.
# 5. Edmonton.
# 6. Ottawa.
# 7. Winnipeg.
# 8. Quebec City
# 9. Hamilton
#10. Kitchener
Which is this mythical Canadian city that is going to be a better draw for Hockey fans than Ottawa? Ottawa is much larger city than the closest competitor, Quebec City, by population, is growing at twice the rate of Quebec City, and is in Ontario which has a much larger population than Quebec. There is a reason the Norqiues now play in Denver. What about the USA though? A good proxy is metro areas by population. Here is the list and the number of NHL teams in each:
New York: 3
LA+Inland: 2
Chicago: 1
Dallas-Fort Worth: 1
Houston: 0
Washington: 1
Philly: 1
Miami-Fort Lauderdale: 1
Atlanta: 0
Boston: 1
San-Fran-Oakland-San Jose: 1 (Sometimes San Jose is separate)
Phoenix: 1
Detroit: 1
Seattle-Tacoma: 1
Minneapolis-St. Paul: 1
San Diego: 0
Tampa-St Petersburg: 1
Denver: 1
St. Louis: 1
Baltimore: 0
Charlotte: 0
Portland: 0
Orlando: 0
San Antonio: 0
Pittsburgh: 1
Sacramento: 0
Cincinnati: 0
Las Vegas: 1
Kansas City: 0
Cleaveland: 0
Columbus: 1
Not listed:
Raleigh: 1
Nashville: 1
Buffalo: 1
The only places that stand out as significant improvements economically are Houston and Atlanta. Atlanta was tried twice and failed twice. They might still try again with expansion. Houston is being considered for expansion as well. The cities listed between Baltimore to San Antonio are all technically larger markets than Ottawa, but the cities themselves are either smaller core cities, unlikely to have a better market due to competition with other spots teams, lack Canada's preference for Hockey, have much smaller economies, et... and would likely be lateral moves (if not worse).
That's it, that is why the Sens will likely never leave Ottawa. Unless it is to relocate to San Diego, Atlanta, or Houston, there is likely no better place for them to go.