To be fair, there are arguments in favour of leaving the other two as they are - there is no reason not to change the Sweeping Lens to Oracle Alteration, unless you give some sort of unique property to Lens (I'd be much in favour of preventing - not revealing! - stealth), so Oracle is basically "red upgrade". This is mostly a gameplay problem, though. If the trinkets are distinct items, they deserve distinct colors.
With the "yellow smite", it's not even the biggest problem with smite items. I'm not colorblind, but it's quite difficult to tell the difference between Devourer and Warrior. It's great that Sated Devourer has a distinct gem colour - last year I've been already suggesting making Devourer yellow. It would be nice to tell these items apart without hovering over them - and there isn't even a chance to do so while watching competitive play. Of course there's casters, or sometimes the components being purchased earlier - but it's not always the case, and sometimes people tune in later on, even people who have played thousands of games, and they will have trouble determining if one of the players is stacking or not. Well now there's the wolf, but still. Just make the tint a bit brighter, pink-ish. Make it stand out from Warrior.
I'd say that teal jungle item wouldn't be bad if we weren't so used to saying "red smite", "purple smite", "blue smite", "nobody buys Poacher's Knife".
Last nitpick is something else from the last season: Elixir of Iron looks out of place. Before Elixir of Ruin got removed, they shared the yellow-ish color scheme, which was one thing - now its background runs in a diagonal manner, while Sorcery and Wrath have theirs as an aura.
Other than that, forward my thanks to the icon team - the latest batch of icons has been consistent, sharp, and always an upgrade (Ravenous Hydra aside, that one got a bit blurred) and overall they have been great at their job. I love the little details such as Shadow Isles crest on Lost Chapter or fish fins on Staff of Flowing Water. It's also funny when some never used files leak with the deploy, such as the updated icon for already scrapped Spellbreaker. I'm the guy who uploads them to LoL Wiki, I check that stuff :D
PS. Do you have a list of icons to update? Boots of Mobility look... aged.