The sensor may be "just a little bigger than FF", but it has a 4:3 ratio. I think this is quite a significant difference.
If one prefers this image ratio or intends on cropping to 7:6 or 1:1, is less of a loss than with FF, and the initial image composition is likely better suited for a final 7:6 ratio.
This may or may not matter. If one intends to continue working with a digital camera coming from MF film, it may.