My work place has had a few bonsai which I had been helping with earlier in the year however have been away from them for a few months. Noticed on Friday the Maple was looking very, very sad. So I've now been asked to try rehab at home, to get it away from the aircon it keeps getting dragged into, and to offer it some more attention and TLC than I can do at work.
Keen for any advice on how best to treat it. Was thinking it is well over due for a re-pot but not sure it will survive just yet. Or perhaps "slip pot"?
I've just brought it home and soaked it for a good 10 minutes, plus a generous misting. While soaking I spotted an odd looking bug which soon went the way of the dodo but not knowing what it is, wonder if it means the tree is infested, which is part of its condition (and I should keep it well away from my own trees?). Pics below ...
Maple as it was last Friday:

Maple today:

Today - close up of leaves (what's left):

Today - close up of soil / dried roots:

Unknown bug (some kind of cockroach?):

Any advice muchly appreciated, and sorry for such sad and sorry images.
Regards,
Daniel