This would be fine to me. I've only joined two successful Ramuh Ex "Farms" because of new people diving in or people with barely any experience.

Is it going to solve a bad player who got carried? No. But it will help filter out people who would change a farm party into a wipe party. I know as soon as I see I'm the only person picking up excess orbs or being firm on shocking charmed people while 3 people with numbers lower than me are running in and out unsure if they should shock if the party is going to succeed.

As for people without clears who are actually capable but could never find parties, that's often me. I simply send the party leader a tell and explain how far I've been/what I know. I'm a good enough player that once I join any doubts they have will be cleared if they're watching my performance. At this point most of my linkshells are FC linkshells of their coil/other hard content statics that I get invited to join on stuff after proving I was good.