The new rod of wonder is kinda disappointing compared to the previous. I'm fine with things like the item eventually being somewhat obsolete due to math or the item being rare (and not allowed by the GM) and the chance that nothing really happens because monsters imagining that they grow leaves doesn't really impede them. That stuff was in there before after all, if you used the rod you accepted the risk that nothing happened, and if the GM didn't like the rod you generally didn't find it. What I'm less fine with is the cooldown. See, before you could spam it for as long as you dared to get an effect that suited the fight. You shouldn't necessarily, it raises the risk of friendly fire, but the option was there to make it less disappointing. Now you get one chance every d4 hours, and that comes with a good risk of doing nothing. Does anything break if that cooldown is cut out?