Got some more information about the concert tour. Here is the full schedule for anyone that might wish to plan a trip to Japan. Official announcement should come soon.
June 5th Sapporo
June 11th Nagoya
June 19th Yokohama
June 25th Mito
June 26th Kumagaya
July 2nd Koriyama
July 18th Kagoshima
July 31st Kanazawa
Aug 11th Osaka
Aug 12th Tokyo
The members appearing at each concert has also been released, Tokyo will be the only concert that all members will appear. All other concerts will feature different selected members. Again, official announcement should come soon.
There are a few notable names missing from the list beside the obvious member Yura Sakura (btw., does anyone actually buy the story that she is studying abroad? It's so obvious that it is a lie). So unless something changes in the near future, you might see a few big names leave the group soon.
As for Yura Sakura, she had events planned until the end of March and all of them have been cancelled including Kasumi Radio from last week. If she really is studying abroad, she would have planned it at least 3 to 6 months ago and would never have set up those events. People don't just decide to go study abroad and leave the next day. Unless she is retiring, it would be a career suicide to cancel events and miss the Muscats concerts. I would assume she is suffering from something serious either physically or mentally,but she does not want people to know the real reason, that's why they made up the excuse. It is similar to when Rin missed all those time during original Muscats.