I like their logo but it is a bit familiar
https://i.imgur.com/INJolXl.png

Is the talent for the play-offs the same as the talent from the regular season?

I think the UK should throw so we get a US Vs UK playoff.

Push notifications (dont know if you need an app for that, I'm not a computer man) for match results would be cool. Maybe users could follow teams and tournaments and then they'd get notifications based on who they follow.

There are 5 roles teams usually fill:
Hitscan DPS - mccree, soldier 76 etc
Projectile DPS - phara, genji etc
Main tank - Reinhart, Winston
Flex - basically anything but usually zarya, roadhog, d.va
Support - ana, Lucio etc.

I'm kind of confused by your question but I hope this helps