It's amusing how people act like having an in-game parser would cause people to discriminate in party finder. There is some key evidence as to why this is a load of nonsense.
1) We already have a parser, and it's been in use literally since ARR, and hasn't really caused any issues.
2) We have an example of an MMO with widespread meters in WoW. Over there, people don't discriminate based on DPS meters for recruitment. Instead, they used either a. have you already cleared the content and have the achievement or b. is your item level high enough. Which leads to...
3) Party finder can already discriminate based on a and b via Duty Completed and Item Level requirements.