I know that the reason why built-in parsers are not desired is the fear that the players would abuse each other over the values. However, there is no question about it. Parsers are almost necessary to achieve greater ability at the game. One way or another, it is absolutely mandatory to calculate relative damage and healing output over time, and the only difference between parsers and doing it "manually" is the time and effort it takes. That means that in a static party, people will STILL eventually find out who is holding the group back and can still talk back at them. Even more so since they would need quite a lot of time spent (possibly wasted) before then, thus getting irritated at the player before they could react.
In a random party however, the time is not high enough (unless the group tries to find out who it is specifically...not going to happen) for proper, certain results.
The lack of built-in parsers, however, hurt the players the most. There are many that USE parsers. It's obvious and no one really hides that fact. Developers themselves don't seem to be concerned about people just using them, so long as they don't grieve other players over them. And majorly, they don't. So...why not allow parsers built into the game in the end?!
As a solution, I suggest two buttons in options. "Allow parsers in party on/off" and another, available only if the parsers are on "Allow a party without parsers to decrease queue speed on/off". Basically, the first option will separate the players into two groups, ones that are fine with parsers, another that is not, and normally, they will only look for players within the same category. The other option allows the system to pair a person pro-parsers with a party that is against them, if the queue is taking too long. However, parsers will then be disabled. Either everyone in the party have parsers on, or no one. That way, a player can decide whether they are fine with the risk of coming across the grievers or not.
On a different note, please change the combat messages in chat. "X is dealt Y damage" is useless...Change it to "X's Broil dealt Y damage to Z." What is the point of even HAVING a combat log that doesn't log the darned combat?! I mean, due to PING and/or the way the system works, I often have messages out of whack. It shows that I used an attack (instant!) then it shows to me damage made by someone else, then it shows me damage done by my instant attack...It's ridiculous...