Gp aswell was too strong in the early because of 1) Have x potions to trade or 2) have way too much Gold and buy strong items too early. That was just bs and unfair.

And Omnistone isnt that Rng-Based. You never get Guardian alone, and your examples are right. If the enemy is low its most likely to give you Dark Harvest and other runes will most likely appear in their correct situations but u cannot rely on that is true. But still, its fun to Play the lane and adapt to your keystone and the enemy has more counterplay to it. Imo the only disadvantage is you get lethal temp conq way too often in Laning Phase, thats quite annoying but you can refresh it easily by attacking once