I think most of them they've tried to duplicate the original packaging (in miniature form, obviously).
But you're right - a missed opportunity.
OK, you've given me an excuse to go into list mode:
Best Beatles album covers:
1 Abbey Road - an iconic image.
2 Rubber Soul - a beautiful photo that must have looked so cool at the time.
3 Sgt Pepper - it's got to be up there somewhere for all the reasons we all know....
4 Revolver - lots to look at
Worst favourite Beatles album covers:
1 White Album - I know it was making a statement - but what is there to like about it as a cover?!
2 Let It Be - come on, please try harder
3 Please Please Me - typical of its time, but not particularly inspired (despite the "unusual" angle etc)