In FFXI, to compensate for the lack of visible UI concerning recasts, people resorted to the windower 'recast' plugin. Without this the player would be VERY disadvantaged, and because the game was so heavily based on damage and DPS competitiveness, it became the standard. The action bar at the bottom eliminates the need for this, it's a perfectly viable option, and it also (arguably) eliminates the need for ability and spell macros.