I believe that would require the federal government to amend the constitution which is no simple feat. All premiers would have to agree to the changes which opens a whole can of worms since Quebec never formally signed on the original constitution, and the other premiers would very likely demand other changes be made as well to suit their own political agenda.

Then the provinces would need to have their own legislative amendments made to recognize the changes in both the constitution, which would also take time to pass as well.

If there is a change in government on either the federal or provincial level, and the party has a vested interest to undo those changes, all that progress gets flushed down the drain.