No because instant runoff-ranked ballots still has the same issues: lack of accountability, under-representation of small parties, hostile politics and the lack of action on issues. The government needs to be heavily pressured to pass proportional representation. It is not difficult for the politicians to do, they're just inventing excuses for themselves to avoid making British democracy fairer for everyone involved.
Here is a video on why the alternative vote is problematic.
The British are not protesting against this nonsense enough when this is the behavior that still being espoused from their government. You do not get to them let off the hook!