Whenever you think a kick feature is too harsh, just remember that BLMs had Warp 2 in FFXI.
You're basicly agreeing that a kick feature is too harsh with that statement as well.
You think that warp 2 was a good thing. It really wasnt. If there was anything abused, it was Warp 2. People being warped at 1% on the boss so the leader could invite a friend for the win/drops. People trolling with it during parties and warping people to anoy the crap out of them. Lets not forget the times where someone from the leader's linkshell wanted to join and he'd basicly just free up a space that way, despite asking or even caring.
Especially with how anonymous the duty finder is, this would be terrible. It would basicly give people a get-out-of-jail-free card, since none of the players are on their server usually anyhow. Good dungeon with a chest that you know contains nice loot up ahead, kick everyone and get it :/ Seriously, no, we dont need this.
Tank not up to par? Talk to him. Ask him, politely, if he should considder getting his gear and weapon in order before entering the dungeon, since you're not going to win at this rate. I know it's a hard thing, but that will 9 out of 10 times get him to drop himself really.
Healer not paying attention? Ask him if he's multitasking and if he could focus on the dungeon or leave the party or we wont win.
Damage Dealer not paying attention? ##&##^%&#%^&@#^& Seriously, that's how you guys react to commentary about your performance. Leave group, start over.
I've never had a problem with a tank being an ***, i've never had a problem with a healer being an ***, but my god... Damage Dealers... Luckily they often enough drop right after causing a massive link and wipe to make room for the roulette, but yeah. Still wouldnt kick them though, you can easily make them leave or correct themselves.