I don't think they need to be reworked per say. But simply adding some of the previous effects to correctly played cards would be very helpful. Play a blue card on tank, give bole-like mitigation. Play a red card on healer, give MP refresh akin to Ewer. DPS players could receive small direct- / critical hit buffs on top of the damage buffs. This would incentivise playing cards correctly, while giving us back some of the strategic options.