I fundamentally disagree. It's human nature to not want your negative business to be in the spotlight (this thread proves that). If you put people in the spotlight they'll generally do what they're supposed to. If that means picking up the slack, etc.
That's exactly what a parser would do. It wouldn't do it for everybody, but I'm absolutely confident just based on human nature alone it'd have a positive effect on player skill. Nobody wants be the CONSTANT blame, so they'll try and fix it.
Actually - I'll see if I can find it for you, but I very firmly remember WoW Devs citing that their data has shown players have gotten better over the years. They attributed it to addons and community theorycrafting. Which includes parsers.
Not only that, but my anecdotal data directly contradicts yours. I have noticed considerably better players over the years, compared to the old days. Something Miste's anecdotes also corroborate. I've been playing WoW since 2004 and FF14 since ARR.
2.8K is what I did in i316 gear on my First O1S kill. In dungeons I think I average about 3k on a single continuous parse in i363.
IMHO - the playerbase in WoW is considerably better than the average playerbase in FF14. In FF14 At least 30% of the time my party members have a player who is near dead weight doing the same DPS I did an expansion ago. In WoW? Maybe 5% of the time, and that's stretching it.
You're right though the biggest difference being there are a lot more parser related harassment and kicks in FF14 because it's hidden and not wide open for everyone to see.
My experience echoes yours.
