A 5v6 is gonna be tough...
Its just where the team is based, they moved to Las Vegas recently. Also its quite clear Overwatch and more specifically the Overwatch League is going to be much to be ran and function much different to CSGO.
Also after hearing Monte on InsightOnEsports talk about how setting up teams in NA compared to other regions I don't blame these organizations for all bringing their teams to the US. Much more potential.