Or HaChaim on Numbers 17:2/אור החיים על במדבר י״ז:ב׳

1 אמר אל אלעזר, "say to Eleazar, etc." The reason Moses instructed Eleazar to collect these censers rather than Aaron was that he did not think the High Priest should perform such a menial task. It is also possible that seeing that these people had died in order to prove that Aaron was the High Priest, i.e. that Aaron had been a cause of their death, G'd did not want that the act of giving some status to these censers should be performed by Aaron.

2וירם את המחתות, and he shall lift up the censers, etc. In view of the fact that this was a totally new commandment why did the Torah write the conjunctive letter ו at the beginning of the word וירם? Perhaps the Torah considered this use of the censers as part of the demise of Korach and associates. G'd wanted the people to see that the Priesthood of Aaron had been His doing and that He would reinforce this decision by reminding the people of it throughout the generations when they would observe that the censers of the people who had challenged Aaron's status were being used by Aaron when he performed the sacrificial service on the altar.