On the lack of a SQUARE TB glyph

[Fred Brennan via Unicode]

I'm sorry to write twice to the list but after some discussion on Twitter it 
is certain I'm going to write a request. 

I only have two lingering questions.

* Does the existence of the legacy Adobe encoding Adobe-Japan1-6 shift the 
balance? It has a SQUARE TB at CID+8306.

https://www.adobe.com/content/dam/acom/en/devnet/font/pdfs/5078.Adobe-Japan1-6.pdf

* Should I also propose SQUARE PB up to SQUARE YB? At the very least SQUARE PB 
in datacenter settings seems useful.

(I emailed Dr. Ken Lunde with these questions, but he's on vacation until the 
next meeting of the UTC. Does anyone know how much time I have before the 
agenda closes? When does the Script Ad Hoc meet next?)