+2 Chaos Canon: Hurry for all/all! That's going to make for some great theme runs.
Badge of Beading: I like it! I'm worried a 00 newbie might be disappointed on it, but that's a thing for most slot expanders.
Bead of Jealous Heroism: I'll reiterate what everyone else says that this drawback seems too weak compared to previous +level items. By comparison: Medallion took a neck slot and two charms, Ring of Fateful took both ring slots, Cook's took head and 2 Ioun slots.
I'd suggest something like bead +no earcuffs.
Belt of the Fearless: Has reams written about it already and many great ideas. I was partial to switching to ranged and maybe adding fear immunity.
Butterfly Cloak: +2 saves puts it in a nice place, but also feels like a side-grade to the Shadowskin. I'm not sure what I would suggest to make it different, but some sort of different effect could be nice just to mix things up a bit. It's not bad as it is, just thinking about variety.
Charm Bracelets: my charms have been getting tight, so this is great to see. I wouldn't be mad at the few suggestions to drop in an entirely different UR here and swap to an Ioun expander path, either. I assume there will be room for the original version in the transmute path.
Charm of Spell Storing: Great item and gives me the chance to make up for not buying the RoSS.
Death Knight Mail: Darkrift is thematic, if a bit underpowered. Would +CON be out of line here? Then again, not every UR has to be perfect.
Earcuff of Orbits: Agree with those who say three slot expanders is a lot for one year. I'd personally do badge and one of either this or charm and then tentatively plan for a transmute path on the one that got bumped next year, but I'm also not sure what transmutes might already be planned for the future.
Gloves of the Merfolk: I like the competition here with Blessed Tempest, though agree with the question of merfolk being associated with ranged, but that's just a quibble.
Harlax's Helpful Lamp: I liked the older version better, starting off the run with a dice roll in coaching seemed fun and I was looking forward to being pumped when someone hit a Nat 20. That said, if I had never seen the earlier version, I would be happy with this one, too.
IS Amethsyt Orb: I like new mechanics and this is definitely that. That said, this is niche even beyond the class restrictions so I don't see this getting used a lot and would recommend it be part of a transmute path to sell more. Ditto on the questions about Lotus Bowl interactions.
IS Flourite Sphere: I'm not sure if this is a synergy effect like the Key or bonus to heals cast. I'd love to see more healing here for the priests as well as synergy. Something like +3 to heals cast and +2 to heals received would keep it useful for all and give a good bump in a slot that hasn't had much healing love.
Lucky Kilt: Making it part of the set is great. If I didn't have the eldritch this would be a no brainer.
Mage Staff of Power: Of course happy to see it and love the new ranged path Wizards are getting. Agreed that the +2 to hit would be nice but also very happy with the switch to INT helping hit instead of damage, which probably balances that out some. How does this interact with something like the Banshee Prism affecting "missiles and damage spells"? I assume that wouldn't add since it's not specifically increasing ranged, but that may complicate the party card, just something to note as needing a ruling.
Ring of Havoc: Love the ability to pick which bonus (more coaching interaction in the year of Harlax) and a huge fan of the Lore mechanic with the Havoc series.
Shirt of the Imbiber: Expected. Agree with the suggestions to put a small stain on it like a spilled drink for fun.
Sniper Spectacles: Good reprint. The suggestions for tweaks to help rogues here with a slightly different item aren't unnoticed, either, things are looking a little light for them.
Overall, maybe drop one of the charm/ioun expanders (with a transmute path planned for the one that gets bumped next year) and consider reprinting one of the rogue tools? I think Ektdar's Tinkering Tool is about due, it will have been 8 years since the last reprint. Or maybe even some new completely new rogue tool, if there's any ideas floating around?