Hrothgar are supposedly meant to be inspired by Ronso, though Ronso have a physique resembling a Highlander so the decision to have Hrothgar be inspired by Roegadyn is a little baffling. Equally, liberties were taken in regards to the Viera and they're by no means a straight up copy of their FFXII counterparts. Which makes the 'lore' argument rather flimsy. Almost everybody who clings to 'lore purity' as an argument, however, usually has an agenda laced in bias.

Furthermore the demand for Viera to be added as a playable race was only so large due to the desire for both genders to be added.