There is already a fairly simple solution - the My Ancestors page can be sorted in order of Date of entry so it's easy to see the most recent entries, which will be the ones that haven't been checked previously (if necessary the data and time of each entry can be found by clicking Show more detail).
That is only fine if members work with small numbers of updates as a large number will just put people off checking. That is why I suggested a limit to the number of records automatically updated at any one time. Unfortunately, we have not yet found an easy way of checking the validity of any particular update performed. I think that what Alexander is getting angry about is what's the point of providing a means of mass updating if the user then has a huge job of checking and cleaning what has been posted. The check needs to be quick and simple.
As for indicating which records have been checked, may I suggest a slight extension of what others have already said?
The existing arrow symbol is black (or grey). This would show that the entry has been added to LC but not yet checked.
When that symbol is clicked to view the FMP census transcription, the symbol should be changed to red to indicate that it has not yet been confirmed as correct. That would provide an easy indication of which records have been compared to the census. BTW, as Peter says that Ancestry is the definitive source for the 1881 census, can we please have the Ancestry (or Scotland's People) transcription displayed for that census rather than from FMP?
Then, when the user has confirmed that the census reference has been updated correctly at LC, a new button should be clicked as confirmation and the arrow symbol would be changed to green to indicate process completed.
Hopefully, such minor changes would not intrude too much on Peter's schedule. Most people checked their references and made appropriate adjustments when the arrow was first introduced, as documented elsewhere on this forum, so the need to re-check entries before the introduction of the new facility should not be necessary.
I am not sure about the suggestion that all members of a household should be turned to green when the first is so updated. Perhaps someone could explain further and justify such action.
That still does not do anything to simplify and speed up the checking process but perhaps that can be considered separately.