I think this line’s packaging will help sales, not hurt.
I too didn’t like it at first but it has started to grow on me after toying around with it. It seems like the natural follow up to the angular TAC 2007 packaging more than the current CW/TLC design.
Also, some of the most successful basic card designs (VINTAGE, VOTC/VTSC, OTC, TSC & TAC) benefitted strongly from having large character art to “sell” the look rather than the generic design card backs of POTF2, TPM, POTJ, SAGA, Animated CW and ROTS.
The promeninet artwork helped give the figure context in the Star Wars universe - especially for kids who aren’t “hip” on all things Star Wars, but remember seeing the cool character in the movie, cartoon, comic etc. and I think this new design will do the same.