I suppose it boils down to the strategical dimension. I, too, prefer
variants that are more strategical whereas the BN and RN pieces typically
enhance the tactical dimension. Capablanca Chess variants are not very
strategical but often result in brutal tactics in the middlegame.
Nevertheless, I have created a version which utilizes the 'relocation
method'. It implies a thorough kill of theory in Capablanca Chess. The
Capablanca piece array can in one move be rearranged by the players,
creating 144 different board positions. There is a strong Zillions
implementation of Capablanca Relocation Chess here. I don't know what
it's worth. I did it mostly to promote my relocation method.
http://hem.passagen.se/melki9/caparelocation.htm
/Mats