It isn't ElvUI producing the map, it's Lyn's minimap that is rectangular. I just dressed it up a bit with a KGpanel background and added a few more panels for guild/friends and use StatBlock's to handle the data text. My ElvUI profile is stripped almost completely of ElvUI, really. The only thing I use are raid/party frames, the buffs/debuffs on player in the top right, the buffs in boss which show below my WA target unit frame, chat, the AP bar and objective frame. I strip out all the maps, data text, extra chat frame, player/target unit frames, etc.