The real question here is how much more slowly will it fill? This kind of sucks for my main group, because I'm a MCH, and one of my friends is a BRD. If we get a SMN or a BLM in a party with four DPS, then we're suddenly being penalized on our LB now? I can understand that it's an attempt to prevent players from just stacking up on DPS builds such as BRD and three casters, but it seems a bit unfair that with four distinct "ranged DPS" roles we now have to start excluding two classes from PF groups if we don't want the LB penalty.....

Of course, if the penalty is something small such as 5-10%, then it won't be that much of an issue. If it's larger like say 20% or 50%, then that's a huge penalty and is pretty much forcing you into a 2 tank, 2 healer, 2 ranged, 2 melee situation, which isn't always ideal for every fight.....