I cleared Copied Factory with an Alliance Raid of only Classes. We also did the entire thing walking. I actually dodged every mechanic locked to walk mode and it was wild. I played the only Rogue in the Alliance and I couldn't hide in combat so they let me be the first to attack the bosses when possible to use Trick Attack. It was probably one of the most memorable experiences I've ever had. I'm sure many people get annoyed seeing classes show up in Duty Finder but most casual content isn't so hard you need to worry about it. If they show up in an Extreme Trial or Savage Raid that would be a whole other story tho.