You have to do it whichever way works best for you, I’d rather have this series of games continue with just the leaders being tracked than have it become a chore for you.
I’d suggest keeping it this way for the next campaign (Dutch East Indies?) and if none of the rank and file stand out change it then. You might try tracking them only after their first exceptional act of bravery? So you’d track leaders and heroes only?
As for people being nice, what can I say? Get used to it. 🙂