When AWB is used on a wiki with a tag for AWB, we can remove/disable the option to "Suppress "using AWB" in edit summaries" in the Bots tab. (Does it appear somewhere else?)
That's an abnormal action/activity I would guess. Most people run stock AWB, which with tags also tags the edit. I'm fairly certain AWB doesn't not-tag pages.
You can add current version regardless of having the "using AWB" appended to the edit summary either way...
Yes we can, I added a maintenance script back in August for this (for this sort of purpose, I guess).
I don't know exactly if we should though, not maybe without doing User-notice first. In many ways it'd be an unexpected change of behaviour for a lot of wikis... @Whatamidoing-WMF is probably better placed for asking if we can/should "politically" as technically it's not an issue to do