It depends on many things, if the BLM/BRD hit before the tank it can be a problem for the tank but most of the time as a DPS i see bad tanks, not very bad, but bad enough to force me to slow down my damages, especially PLD since their flash is less strong than Overpower. A lot of tanks don't understand that spamming flash, especially with BLM and BRD is very effective, even at the beginning of 2.0 with my PLD ilvl 50 i managed to hold hate easily against ilvl 70 with ilvl 90 weapons.

Just wanted to say that it's not always the DPS fault sometimes it's the tank's.