Majority of my players likes the shiny bits in WFRP3, some just find basic cards useless, some are conservatives and would rather play with pen and papers instead of cards. But they all enjoy the dices and the tokens.
People might play without the other components, for example, by counting rounds, stress and fatigues on a paper, or on standard numbered dices. Progress tracker is just a visual prop to count rounds. Playing without action cards would really be a pain in the mass because you would have to copy all those symbols on 2 sided cards on a blank sheet.