As foretold, I tested the game with the following modifications:

I added in exp_descr_character_traits on all family-trait (example gens Cornelia) I add battleSurgery 50

in exp_descr_unit I plus 1 / 3 the cost of maintenance of all units


The result was this:

-I lifted the fog of war to monitor the effects
-I started a campaign with the Romans
-I quickly found difficult to capture the rebel provinces
-after 18 turns I had taken only Tarentum
-I noticed that after 40 turns the geography of the other factions remained unchanged
-after 50 turns I got the sicilia
-after 74 turns I came to Spain and now I'm facing the Carthaginians and Iberians

note:
*more troops battlesurgery buying experience easier
*the expansion of the factions is slow and there is never the "snowball effect"
*in the Balkan and Greek area survive all factions (at least up to where I arrived 88 rounds)
*I was able to bring my full army from Rome to Sucum Murgi: 6 battles facing and having an army yet discreet, very good!
*There are few armies around but solid and seasoned
*after a great battle won there are no more enemies for 10-15 turns
*production is very slow
*I note with pleasure that Seleucid does not succumb to the Ptolemaioi
*the game is generally much more realistic

advice at all to try a similar game experience I'm enjoying a world