There will be no power nerfing unless the powers or skills are game breaking. It's a case by case basis. For example teleportation would be nerfed - we do not need characters teleporting to the Oasis Station, but short range teleportation is fine. With regards to healing and typical immunity to viruses - they would also be nerfed, nothing can heal away the Ira Virus. No characters are immune to the Pestilence (Ira virus).

Project Oasis is very new therefore it is still finding its footing with regards to pace, however so far it has been shown to be slow to medium paced and very back-tag friendly.

Hope this helps!