What I tried to do above with the re-scales, was to make sure that each race (and particularly the shorty races) would be standing a head taller/shorter and with different proportions (skull size to body, or overall body shape) so they are not identical and are unlikely to be mistaken for one another at a glance.
Just as a small aside to this, as a curiosity more than anything else - if we were to go by Wizard's proposed publication for their new one D&D content, the difference in height between halflings and gnomes has been more substantially settled. In that document, they've defined halflings as standing between two and three feet - so they average around 2'6", while gnomes are three to three and a half - so averaging around 3'3", so, in the new document there's be a good head's difference between them on average (and the halfling in the comparison would need to be even smaller ^.^)
