If random item numbers are good and fun i have great ways to improve the game!
Why not make it so you get Random amounts of Champions to select from too! Wouldn't it be awesome if you randomly couldn't buy a single champ the first creep round? It would be super sweet if you randomly got to see 10 units each round right? Oh next you could add random amounts of XP per round. Wouldn't it be sweet randomly be level 6 when some is still level 3! Oh and how about random gold too. Like if your econ is about 50 you can randomly between +0 and +10 Wouldn't that be so fun. Oh and how about the carousel why not make it so your in a random pick order. I just love it when my strategic choices don't matter in a strategy game, makes it feel worthwhile.
/Sarcasm off
I hope i made my point. Getting random resources is fun because it makes every game different and adds a level of complexity that wouldn't exist otherwise. Getting random amounts of resources is just frustrating when you don't get them and an empty victory when you do.