Why a larger Bismarck invites design trouble

What would a larger Bismarck be like?

It would likely become more cluttered and less coherent, because greater scale invites too many competing additions.

A larger hull could avoid the awkward compromises of the Deutschlands, but it would also make every available weapon look tempting. Bismarck already carried numerous weapon types whose ammunition and support arrangements could not be freely shared. Further enlargement would invite designers to add more systems instead of simplifying the combat system. Growth without discipline can turn spare displacement into clutter and reduce ammunition depth for each gun.