Please whoever in VW is in charge of the Stair tool, you need to understand that the world is not ruled by US regs [or any other single dominion]. In the UK, we do not have the walk-line rule. AT ALL. Not for existing / old stairs, nor for Proposed / new stairs. We do have a rule regarding Offset, but I wouldn't want to impose this on any other country. So please allow us to over-ride the Walk-line.
Also, we no longer have a rule limiting the number of risers in a flight to no less than two - in a new residential house, we can have single steps. YES REALLY.
So either: make any 'Rules' opt-in voluntary
or: offer a set of rules tailored to every dominion / state / local authority [e.g. England differs from Scotland differs from Wales] and allow the user to choose from a drop-down
Please do not force us to submit to US rules and look like fools to UK clients.
This has been the case for years, you've had feedback for years that a change must be made, and you've done nothing.