I think he means make the strong weapons last longer. I don't think it would hurt, it would only help some people's play experiences and not harm others. Personally don't see it happening cause Nintendo is pretty conservative with patches for singleplayer games.
Stronger weapons do last longer
Go and look at a weapon list online. You can see durability rating on each weapon. The weak weapons have like a durability of like 10-15. Some of the more powerful weapons ahve durabilities of like 40. The amiibo weapons and champion weapons are like 60+