The build queue interface was poor in Civ V - it took me long enough to learn how to set a build queue in Civ V that by that time I'd got used to playing without it. I suspect it's just a case of the way most players now play the game making it in as a default setting - like the resource icons littering the landscape which I dislike but seemed to be commonly used in Civ V. The long-term feature that appears to be completely gone that baffles me (I can't find it in standard or advanced game setup settings, and the random 'Create Game' setting has a set map size) is the loss of random map sizes as an option. While I never like rolling duel maps, it's always been core to the Civ experience to me that as much as possible is unknown from the start. I already disliked the various ways Civ IV and V let you 'cheat' on identifying the total number of civs in a given game before you'd met them all (information hidden in earlier iterations); losing the option to randomise altogether seems to make no sense. Even if only a minority ever did that, it was only an option and was never the default - so why remove it?