I remember playing against Ruwin in a shoutcast and when they went to vent, he pretended to sound like a girl. I'm pretty sure the other team did not know he was a dude and was under the impression that is was ruwin's sister.
It will pretty much all come down to how many new "invite" teams we let into invite compared to how many IM rosters we allow into invite. I guarantee the majority of the players on dead invite rosters are already plotting their next roster that will die the exact same way their previous one did. The problem with the blacklist is that although problem players play a big part in the death of the team, it's normally not the main reason. Normally, losing just takes it toll so in this case the blacklist won't stop unstable teams but rather unstable players.
Let's say all 4 LAN teams stay together for next season and for the remaining 4 slots I take 3 IM teams and 1 "new" invite team. Now all the invite players from the dead teams have nowhere to go but open which is how it should be. The problem with how we've been running tf2 in the past is that due to the frequency at which invite teams die for now all of sudden to say "Too bad go to open" would create a huge influx of brokenly strong open teams. The few times that an invite teams ends up in open I get angry pms and gigantic threads on "WHY TEAM X SHOULDN'T BE OPEN". Now imagine, there were 4. That's pretty much what we're looking at if we took a harsher stand. The good news is over time the frequency of invite teams dying should go down. The bad news is open will take a hit and it will strongly discourage lower open teams to joining (like they were going to win 1st anyways). Also, invite players might retire because they don't want to repeat the 2 season process of going invite. Also, every seed the worst IM team that gets into the poll always cries and says they will all quit if they get in invite. With this method, the skill disparity would grow in Invite. Of course, we have absolutely no idea what happens when a decently good IM teams stays in Invite for 3 seasons as it's never happened.
TL;DR Although everyone is yelling for more IM teams to be in invite, the middle IM teams that would barely make it don't want to be there. What do?