Yeah but who would pair with Italy if they release Greece without them? Greece will probably pull in other Balkan countries like Bulgaria and Turkey, which leaves Italy with few "popular" options. In my opinion the best choices to go with italy are
A tier: Greece, Bulgaria, France, Spain and Portugal (already done so no)
B tier: Turkey, Yugoslavia (attempt #2). Croatia
C tier: Austria, Albania, Ethiopia, Libya (too few factories and while Austria would be decent for German-Italian influence games they get eaten up too early to be fun for players)
D tier: Middle East (should be their own DLC)
Mechanically Italy would go well with a naval rework, but that's also been done already.
Greece probably won't come alone and their neighbors are Albania, Yugoslavia, Bulgaria and Turkey - all which would naturally go with Italy. So an Italy themed DLC is fairly short on good countries to package it with and doesn't have many good mechanics (African theater and logistics I guess).