When players cannot meet DPS requirements for content and thus cannot clear, then yes, it is disrupting my play and everyone else in the party that are making an effort to clear the content. The onl;y difference a parser would make is in showing where the problems are. DPS player 1 and 2 may be doing over whats needed, whereas DPS 3 and 4 are doing under the minimum required to clear. A parser will allow the rest of the party to fix the problem and either help the underperforming players or replace them. The underperforming players will know exactly why if they get replaced and any sane person will try to fix that so they no longer get replaced. NO ONE goes into content with the intention to fail.
How does one persons subscription outweigh the combined subscriptions of the rest of the party if that one person is disrupting the others gamplay by underperforming to the minmum standard required to clear content?
Also, I'll ask again. Would you keep an underperforming tank who keeps losing aggro and cannot be bothered to get it back, which causes the party to wipe? Would you keep a healer who doesn't heal enough to keep players alive, so party dies and wipes? So what makes DPS so special that they can underperform and not be held accountable?
Also viable reason for kicking underperforming players is difference of playstyle. There playstyle is playing badly. Player dispute, thus fine with the vote kick rules.
Also I've stated before, and others have too. players are ALREADY being kicked from parties for bad gameplay. With a parser DPS will know exactly why they are getting replaced. Also it would act as a wake up call to no, they are not playing to the minimum required to pass said content. With that wake up call we may actually see less whine posts demanding things get nerfed. Or less need for content getting Echo buffs.
In before, I main as MNK, and doesn't matter if I'm with static progressing on Alex Savage or with random players in Duty Finder, I play to my best to contribute towards a fun and succesful run for everyone. Levelling NIN which I hadn't touched since I got to 50 many months ago, I didn't touch DF until I got comfortable with the rotation again and was performing adequetly.