Hiragana Keyaki album delay, June-July Tokyo-Nagoya-Osaka tour

At Saturday's handshake event mini-live there were two Hiragana announcements:
1. The release of the album has been delayed from 23 May to 20 June.
2. Hiragana will do an eight-event tour with lives in Tokyo (1), Yokohama (3), Nagoya (2) and Osaka (2).

Yokohama June 4-5-6 (Pacifico Yokohama National Great Hall, max seats 5002)
Tokyo June 13 (Tokyo International Forum Hall A, seats 5012)
Osaka June 27-28 (Osaka Festival Hall, seats 2700)
Nagoya July 2-3 (Nagoya Century Hall, seats 3000)
all seats ¥6800, reserved. fan club first, starting Sunday.
source 

Osaka Festival Hall

  
The album may have been delayed to get a better date with less competition from other groups' releases, or to accommodate the tour, or to give time to make the album better. Or something.

That size of hall looks pretty intense. Might a performer feel intimidated? Or might the audience seem distant?

Nagoya Century Hall

Pacifico Yokohama

Tokyo International Forum

That being said, isn't this exactly the size of hall (5000) that Keyakizaka46 performed in in March, 2016, in their first big concert, just before the release of SaiMajo? (Yes it is. Debut Countdown Live. I just watched a bit of it. What a great show. And a revelation, at the time.)

Hiragana will be doing it eight times over a month, as they incorporate the 2gens fully and become a full-size group. I picture them creating  show every night, working to draw the audience along with them emotionally. And succeeding.