Honestly, if the other maps are too small, why the heck does the solution have to be the pizza map size?? It is 4 times as big as others.
I wish someone made a map thet was only twice as big as the others.
The problem with pizza size is that all relevant info (bars, base numbers and owners, dots etc overlapping) are a big blur when one tries to figure out what is happening on the map. It becomes readable only when zooming so close that one can see only one small portion of the map.
Thus all just end up doing their own individual stuff at some area. Just several small scattered fights or hits at undefended fields. Or they just go where al other are. This gives the big countries (often the bishes) the possibility to have to large groups.. one fighting the small country's force and the other taking the undefended bases at some other location without anyone really noticing them.
That could be helped a bit by changing the map icons. e.g.
-get rid of the scaling country icons beside the base icons, show the ownership by color or some other way.
-make the base icons keep the right size compared to terrain when zooming the map.. thus to see the base size one might need to zoom a bit closer