What would 28-knot Queen Elizabeths imply for the R class?

What would 28-knot Queen Elizabeths mean for the cheaper R-class battleships?

Fewer of the same boilers and perhaps twenty-five-knot R-class ships are suggested, with further consequences for Renown and Repulse.

The follow-up asks whether a much faster Queen Elizabeth class would make a slow, cheaper R class unattractive. One possibility is the same boiler technology in a reduced installation. The suggested result is a mass battle line approaching twenty-five knots, with the R class occupying a role closer to the historical Queen Elizabeths. Converting two such hulls into Renown and Repulse then opens the possibility of thirty-five-knot battlecruisers. These are linked design possibilities rather than fixed results.