All of these are/were for a reason, so given the same constraints, they would all be used again, apart from the round bottom which has been replaced with the flat as it is easier to build, lighter and has less windage as the hull can be lower.
eg
The beam angle gives more or less tramp space for cruising or racing
Berth ends are pretty much a function of the shape of the rest of the hull
The short overhang is to provide bench space, stiffen the hull and keep it narrow.
Cockpit seat direction is a matter of choice and the rest of the layout.