In Florence Dip, Italy works kind like England. Heavy naval expansion first, followed by army builds and convoys once there is a firm foothold somewhere (Iberia, Balkans, Turkey, Austria, etc).
Bouncing in ADR is like bouncing in ENG: good for defense, but terrible for offense, so it should be a real dilemma for Italy/Austria.
It's important to note that Italy will actually have a harder time to win with this variant, but draws will be easier. It becomes quite a Wicked Witch of the Center.
A SC at Venice enabled easier LAND reach of several northern and eastern centers, like DEN, HOL, WAR, SEV. These 4 centers are one season further away (5 rather than 4). Convoys will be Italy's primary method of quickly reaching somewhere.
Since a growing Italy will have a harder time reaching these places, conversely Italy will also have an easier time defending from more powerful French, German or Russian players. Expect Italy to join draws far more frequently as Piedmont/Venetia form a powerful barrier from invading armies, while Italy's early advantage in fleets cement control over WES and ION quicker than in Classic.
It's important to stress that Italy can now reach a second neutral SC in 1901, something impossible in Classic! Austria can ask for a bounce in Venetia in exchange for supporting F ION-GRE (which can only threaten Turkey, never Austrian Serbia).
Turkey may also be willing to support Italy into Greece, in exchange of a promise of building Army Florence/Rome and Fleet Bari (Taranto) against Austria.
So, this early boost may cover up a lategame's reduction in number of easy SCs.