Once again those game did not have addon support when they launched. And like many have been saying people have doing ops just fine withouth dps meter.
Warcraft dosent have dps meter on default.
Rift dosent have dps meter on default.
On that matter does any mmo that have come out to market have dps meter? So why should Tor have one?
I dont know what kind of population your servers have but in mine I just have ask on planet's general chat if anyone wants to do group quest and there is instant whisper that Yes I want to do quest with you. So yes please no lfg tool EVER NEVER.