It sounds weird to say, on its face. You're getting stronger, you're going from Stone 2 to Stone 3, why shouldn't the spell do more damage? But we've been seeing issues with DPS metrics when crit and direct hit are interacting with abilities with exorbitant potency values, and potency can't keep increasing time and time again without having to be squished down later.
Tell the truth - when you went from Glare 1 to Glare 3, did you genuinely notice the 10 extra potency, or was it just the fancy animation that made you notice it? When Rage of Halone upgrades to Royal Authority, do you actually notice the potency bump?
I feel like most people don't. And, granted, bumping potency on filler abilities isn't the issue... it's the 1000+ potency big "finishers" critting or not critting that's causing problems. They're going around making them autocrit, but this creates problems of its own...
See, I don't think the majority of players actually care about or even really notice potency boosts or changes unless they're HUGE (like 200+) swings. 50 potency is a big difference on a parse, but it's not something you really notice in-game unless you're really looking for it.
Remember all the LOL WAR BLUE HEALER GREEN TANK HAHA UNGA BUNGA memes? That didn't happen because of EW - WAR was *already* the "green tank" in ShB - but Bloodwhetting has a *much* fancier and angrier animation than Nascent Flash does, and Primal Rend... well, honestly it's a pretty fucking badass move and people were right to be excited for it. But WAR didn't fundamentally change for the average player between ShB and EW, yet it went from a class that was played an average amount to a class that people were CONSTANTLY soiling themselves over in an attempt to spam memes harder than everyone else was.
Because it *LOOKED* and sounded cooler than it did before. It's not like PLD or GNB weren't just as ridiculous with the self-heal spamming... but they were less "cool" about it than WAR was.
So, to me, I'm not convinced we actually *need* to keep bumping potency in every damn expansion. DPS numbers will be higher than before simply from raw stats alone, without potency adjustments. And the less power creep we have in potency, the less it's going to fuck with MINE-running old content (and thus also require less effort for them to go back in and tinker with that old content to make sure it's still at an acceptable level.)