This is a general discussion post, so I feel inclined to add my response to the OP. Archetypes were important to how the game was played on release back in 2004. Archetypes followed key roles that balanced each other together in a multiplayer environment, so that as the difficulty of the content increased, the need for each role became more apparent.
If you've stuck with this game since then, you'll be aware of the reality that archetypes are really just a formality now. Epic and Patron Pool Powers, temporary powers, heck even Day Jobs and P2W powers offer a little bit of everything, so a Defender can play like a Tank or a Peacebringer can fill the role of a Scrapper (though this is more inherent to the archetype than others). With this Freeeeeedom, players can do whatever they want nowadays. They aren't consigned to a specific role that only works "best" with specific builds.
The game is back, play how you want to. But when you are teaming with other players, I ask that you try not to make other players feel left out if their "set role or archetype" isn't being fulfilled on a team.