The PvP scene for single queue is absolutely horrible except for AV. Facing premades 24/7 is why most people don't PvP anymore. Apart from that, PvP in vanilla is a unique experience that every other WoW expansion can't compete with.
More players should embrace this addon. It makes it much easier to track players typing LFG and LFM.
People use it on the 2 other servers with great success.