Well yeah, usually I have Italy, Illyria, and at least half of Greece in rhr first fifty years.
The problems IMO are that it's a bit too easy to consolidate Italy. There should be more non Roman pops and greater tensions over cultural integration. Historically Rome basically used a vassal swarm until the Social Wars led to the general Romanization of the peninsula.
I integrated Italiotans and Lepontic for traditions. And Italiotans are out by now again.
I'm a rather peaceful player, as such I have in my Current Campaign by 588 AUC only Magna Graecia, Italia, Greece, Macedonia, Asia, Gallia Cisalpina, most of Rhaetia and most of Illyria, plus the province of Carthago. I do plan on declaring with Imperial CB on Carthage soon, but want finish Illyria firsi, and/or step more firmly into Gallia Transalpina.