Stop using a flat numbers when commenting on changes to minimize how much of an impact they are
Currently Riven has a change on the PBE:
Valor (E) cooldown increased from 10/9/8/7/6 to 14/13/12/11/10
I see people saying "lol four more seconds on her shield like that matters". In this case it actually does. That's not four more seconds. That's a 66% longer cooldown. That means no matter how much CDR she builds, her shield is available nearly half as often. This means she goes from about an effective 36 + 17% bonus AD of shield every second when spammed on CD to 22 + 10% bonus AD. That's a substantial reduction in how much shield she has available.
When you comment on a change like this, it has to be compared to before and after properly, not just the difference in the patch notes
Here's another example: Darius was recently buffed to get 15% missing HP healed per target hit with his Q blade instead of 12%. By Boards logic, that's "lol useless 3% increase". Except going from 12 to 15 is a 25% increase - this change means Darius is healing for 25% more than he used to every time he lands a Q blade. That doesn't seem so insignificant anymore.
A flat number with no context is really meaningless. If a spell is given 10 more damage, without knowing anything else about the spell, there's no way to know how big of a change it is. If it's a 600 damage spell with a two minute cooldown, that change is irrelevant. If it's a 50 damage spell with a two second cooldown, that change is massive.
Does this mean there's never been a time when Riot has made flat number adjustments that were borderline worthless? Of course not - the 0.25 sec CD increase to Zoe's Q comes to mind - that was a 3% decrease in the spell's availability. That's hardly anything, and this isn't the only example by far. But when you only look at raw numerical value of the change and not the proportional value compared to before the change, you will never get the full picture of the impact.
Edit: Just to add some clarity, I'm not trying to say that percentage differences are the end-all be-all of analyzing changes. I'm just saying the difference in the path notes doesn't really mean anything, you have to consider how strong the ability is before the change to properly assess how impactful the change is