You have to ask yourselves this - what would it look like if it were bricks?
Well, it wouldn't be a flat slope for a start, the way brickies got over this was to have the slope done in steps that way the bond follows through for the two faces of the wall as you look at it side on.
Too many tilers do not understand the layout of what a 'metro' tile should be. They were originally glazed faced bricks and so they were set out as a structural wall rather than a facing decoration, like what we see today.
I think the way you have tiled the slope, is the cleanest aesthetic way you could have done it.