Assigned To field and email function improvement

It would be nice to have the Assigned To field be splitted in Assigned Group and Assigned Technician. I believe it has long been like this and it would be it as an option and/or improvement.

About the e-mail functionality, in my system the Requester and Observer receives the Answers update individually, this confuses them that they are the only one receiving the update from the technician. Wouldn't it be nice to have a one e-mail thread that already includes both requester (To) and observers (CC)?

Lastly, can the ID of ticket type Request and Incident be different? It is just plain numbers and having a naming convention would just be nice. (i.e. INC-#######, I-#######, SR-#######, R-########, etc.)