Here's why the Albun was Delayed , Here is the timeline

August 2013 - Announce Reunion/ Work started on Album
September -working on album as DK4/ Album about 30% done
October - working on album as DK4
November-announce Comeback show @ HOB's / working on album as DK4
December- Comeback Show @ HOB's / working on album as DK4
January - Bye Bye Baby Leaked / working on album as DK4
February- working on album as DK4
March - First New Song Snippet/Vegas Show / Big Announcement (Tour Announced) Album 80% Done
April- working on album as DK4 / Aundrea tells DK about Leaving before Tour Starts 1 week notice
April- Album Done
May - Aundrea Annouces/Comfirms Departure at First Tour Show to Start a family
May - Lemonade Released/ Introduction to DK3/Tour
June-End of Tour / Aundrea's Farewell/ Return to Studio to Re-Record the Album and Create New Songs
July- Working on album as DK3/Re-Recording/ DK City Walk (DK3 Official Debut W/O Drea) /Lemonade Video

I hoped this Helped but Know that they are in the studio every night and are working as fast as they can , Typically if you look at the timeline or in general when an artist is recording the duration is about 5-8 months so the Album was DONE before the Tour and they stated that in previous interviews but with them being blindsided by Drea's decision they've had to do 5-8 months of recording in a month/half to meet their Deadline which typically now the album would be getting mastered for a final listen and preview of the whole album . There is a release date Set Between the girls which will be announced In DK fashion ; The Lemonade video is being shot this month and they have multiple treatments and are just trying to pick the right Director and all this while recording . If it would have went to their initial timeline set when they were at dinner back in august they would have been focusing on visuals and not recording again . Ps Lemonade does not count as part of the re-recording process given it was the first DK3 song together and was recorded in May right before the tour . I hope this Helps Everyone Question and Worries .