I think you could get a command like /clearlaginfo or so to see when next clear lag will be. This should be good if you are joining the server and gonna break some blocks fast then you dont see that its next clearlag in 10 seconds and you lose 1 spawner or maybe 10?
Example
Danceboy2002: /clearlaginfo
[ClearLag] Next clear lag will be in 20 min
Give me your opinions.