http://www.unrv.com/roman-empire-map.php
So Caesar avoids his suicide, and goes on another expedition into Dacia.
First question is does He , simply invade like Trajan did in 101 AD, Or conquer it like Trajan's 2nd expedition in 105~107. Or 3rd choice -- Defeated like worn out Napoleon at Waterloo.
I'll assume that the OP wanted to talk about Dacia being part of the Empire 140 years earlier than OTL.
With Roman settlers in Dacia, Roma controls the Danube. I don't see how this butterflies the Dalmatian Revolt in 7AD, but it does butterfly the Pannonian part of the Revolt.
With Control of the Danube Mouth, Rome can move more men and supplies Quicker, Meaning the Revolt is over Sooner,
General Germanius is then available to command the Expedition across the Rhine in 9 AD.
After this I see Romes Contact with the remains of the Greek Cities along the North Shore of the Black Sea , pulling Rome eastward, with more Romanification of the Southern Ukraine.
As Rome settles the northeastern shore they will move up the Don, and down the Volga, With a Small Roman Settlement on the Caspian.
This will bring Rome more in Contact with the Eastern Powers.