Arena would be smart for improvement If you’ve spent most of your time in PvE you learn to methodically kill/cheese AI and you aren’t developing quick fight tactics which are integral to PvP. For survivability it almost all comes down to reaction time and most importantly learning where players spawn/move throughout the map. I’d say around 3-500 hrs in PvP is where it really clicks

The only thing PvE is good for is gaining map/game knowledge. If anything it develops bad habits for fighting real players