Couple of Thoughts on this
1) If there are no Huns to defeat Airmanreik (Eormanric), the the Goths aren't pushed against the Empire and the Romans never commit attrocities against the Goth refugees, there is therefore - No Battle of Adrianople. However, Valens doesn't die and continues his atrocities against the Goths in the Empire unchecked, eventually alienating the Goths and the Romans.
2) With no defeat at the Battle of Adrianople, Roman military doctrine continues to focus on infantry for another 50 - 75 years. In aother words, the legions remain infantry longer than OTL.
3) With no Huns, the Gothic Kingdom of 'Aum' will grow in strength, while the rulers will be more Romanized, it is likely that most of the peoples will not be, so the kingdoms will stay 'approximately Gothic'.
4) The strong Gothic lands will serve as a model for their still close West Germanic tribal cousins. In addition, without the Huns, the Gotterdamerung myths are not so central to the cultural mythos of the Germans, Christianity makes slower inroads into the North.
5) Vandalic Kingdom founded in Dacia, Visigoth Kingdom in parts of Bulgaria and Romania. The Visigoths never move against the empire in any number and remain in Eastern Europe. I am undecided whether the Langobards continue south into Italy, East into the kingdoms of the Goths, or west into Gaul or North Italy.
6) Since the Goths were Arian Christians, there would be increasing number of religious disputes between Romans and Goths. Dispite this, since the Roman mentality still doesn't see beyongd the empire, there would be no big wars.
7) Even without the Huns, the Western and Eastern Roman Empires continue to fall apart (Remember, the split predates the arrival of Huns).
8) the Western Empire, would stand longer, but Franks and other German tribes had already moved into Gaul, so there would have been a gradual germanization of the area.
9) Hispania is never invaded by the Visigoths and it gradually becomes more predominate in the affairs of the Western Empire, particularly if North Gaul is Germanized and Italy becomes the battle ground between the Eastern and Western Empire.
10) There would probably be a series of wars between the East and the West (picture Julian and Constantius for 100 years. These wars would be fought out primarily in the Balkans and along the Adriatic Coast, although it is possible that Italy itself might be invaded.
11) The Roman dynastic disputes would proably be fought out in a broad area between North Italy and Greece. These wars would eventually cause one emperor or another withdraw the legions from Britain, there would be some additional movement of German tribes into the area.
12) Without the huge death toll on the goths caused by the Huns, there would be many more of them, and their numbers would probably force many of the slavic tribes either into the West, or toward the East where they would be met by the Turkish tribes coming West.