Kudos to him for fielding our first eleven so that we could really challenge for the title and don't get embarrassed by napoli that keeps punishing on every change they get and esp in every cup based competition (imagine the rape in CL)
I believe that conte would not, even if there wasn't a reason to rest them.
I believe there was not much he could do, we simply lack the material to defend the lead with such pitiful defenders. Maybe he could try a more risky and offensive approach and just try to score more than can concede, but napoli also are more prolific than us and can take their chances.
There was really nothing he could do, we are simplymy inferior on one on one situations with napoli, we can only use our depth to beat them in a league competition...