No CFL teams went with one dual kicker handling both jobs last season as their main roster thinking. As i've harped on before here - IMO - it's a huge risk and dumb roster management to rely on just one kicker to do 3 jobs (including KOs where the guy can get clobbered trying to cover); you lose that one kicker early in a game to injury and unless you have another roster player dressed who has decent kicking ability (say a Dave Stala), you can pretty well kiss winning that game good-bye (unless you had a Doug Flutie at QB against a $hite defence) - and every game is important (usually) in an 18 game season. ZERO NFL teams in modern days have ever relied on just one dual kicker. Has been done in recent CFL history some and a guy like Bede (or Liam H) are certainly quite capable of doing both jobs very well.
An injury and no time to find a decent replacement for next game could happen; but a team could always use a PR spot for a kicker, or have a guy hanging around town.

I hope the Argos are not dumb enough to take this gamble and roll with Liam H. doing both jobs - and Haggerty is an outstanding punter; maybe if they could not find an even below average punter.

Jones in EE land might be dumb enough to go with just Bede dressed as his only kicker.

Some CFL teams dress just one back-up O-lineman still.