Really it wasn't a problem during Slaughter on Aether, revisionist history much. Or during shatter on Aether either really no problem at all. It has always been a problem. Its just usually they get bored and stop queing and stuff evens out.
Also why aren't the same people so upset about this arguing for premades in solo que feast? Why because they know it would be unbalanced.
I don't think premades need to be lowered. We have a scaling reward system already it should have just been implemented for que with parties of 8 being baseline. As party gets smaller and smaller rewards increase. Which means a team of 8 most likely going to win would get as much as a single person queing. The 8 man gets their win and feel good slap on the back the solo que knows he got slapped around but got the same reward.