Based on the answers provided, the following corrections need to be made to the 3D object:

1. The object should be modified to consistently resemble an L shape from all angles. Currently, it appears more like a V or an inverted V in some orientations, which needs to be corrected.

2. The object's length should be made more apparent. It's currently unclear whether the object is long or not, so adjustments should be made to make this characteristic more evident. This could be achieved by adjusting the proportions of the object to emphasize its length. 

Remember, the object should still maintain its extrusion in one dimension as this aspect is already correct.