Thanks @KHaggard - please keep adding findings and FR-Tech will continue to review!

Thanks @AKanji-WMF ! I just updated the task description removing four cids as they were small and resolvable on my end. :) Thanks for keeping an eye on this !

1. New Status showing as blank in Civi - this was just a problem with the label not being attached to the new number (25) correctly & is fixed now

2. Acoustic mismatches

35918419 - contact was correctly showing recurring as they were being 'Acoustic merged' into another version of them who had recurrings - I have merged the contact in Civi now

bobby is picking up Major Donor from his foundation that shares his email - probably a bigger discussion but the 2 are being Acoustic merged to get that status

3. outliers

61936037 is deleted & merged into 30580937. The email of the deleted contact is different to the one that was kept so the contact in Acoustic has probably been added to the suppression list (which we do so they don't get further emails on the secondary address - although they do seem to have had some around about the time they were merged - probably a timing issue

Looking at the others - a bunch are deleted in Civi so there would be nothing to update

select t.id as id_from_acoustic, c.id as id_in_civi, is_deleted FROM temp_ids t LEFT JOIN civicrm.civicrm_contact c ON t.id= c.id ORDER BY is_deleted;
+------------------+------------+------------+

Which leaves the table below - I dug into a handful & they were all oddballs & not seemingly a systemic issue so I'm not sure it's worth going through all of them

@KHaggard see above for comments - I fixed the label on 'new' - the others didn't seem to need anything - I didn't check all the rows from the last table

Thank you @Eileenmcnaughton ! I appreciate you looking into this and I agree there's no systemic issues so far, just oddball cases as you mentioned.
We have a couple people still doing their QA so I will flag if anything else surfaces by the end of the week.