the boot in time to meet the romans or samnites as they were developing, and have good odds against them.

I think unless they stuck to being wine drinking coastal elitists, they'd have a tough time chewing on the Lucanians for a long time, but I think there could've been an angle at trying to use Rome's Latin neighbors as footholds to come in via the sea and wage a proper campaign.

unless some dorkass like dionysius still tries fighting in mainland Greece. or taking armies to africa to pursue the carthaginians.

Honestly would be a completely absurd move to try and take the fight to Carthage proper even if a lot of their armies were tied up in managing their growing little kingdom with keeping the peace among the slowly integrating Libiyan tribes. Such a foolish campaign could've caused a power vacuum with the fall of Syracuse and lead to an earlier carthaginian hegemony over the Mediterranean before the romans could ever really take off and start their imperial republic