dalaran/garrison hearthstones are becoming toys, but how about:
Direbrew’s remote
Admiral’s compass
Last Relic of argus
Darkmoon Cannon
the rogue ravenholdt teleport doohickey
flight master’s whistle
Darkmoon adventurer’s guide (make it just something you activate to put a buff on you?)
Mana divining stone (the suramar thing for ancient mana)
i’m sure there’s plenty more things that really just should be toys at this point. Bag clutter is terrible.
Those help you play the game of inventory management 
Do you really need to carry all of those with you at all times? You do have a bank.
The thing about convenience items is that they become significantly less convenient when you add a trip to the bank to pick them up.
(although to be fair, my toybox has become a bit of an unmanageable mess itself)
Luckily the search box mostly mitigates this as a “problem” if you know which teleport you’re after. Typing a few letters is still far quicker than heading back to the bank, heh.
As an engineer, finding them that way is old hat by now.
I highly recommend the Tome of Teleportation addon too.
Gives you a menu for any and all transportation toys or abilities you might have.
Well, at least two of those are useless: flightmaster’s whistle is unnecessary and the mana divining stone for Suramar keeps the buff even if it’s in your bank.
Alas I’ve noticed that my memory of late is starting to lose track of the exact names of toys. I sometimes have to google are idea of the toy I’m looking for to find out what it is actually called before I can search for it.
Yes
I even carry my heart of azeroth, artifacts, whatever iconic from each expansion is necessary
I still have that thing where you collect mana in suramar
Because you may never know you just one day decide to go in those expansions content
You can still make bag space and carry some old legacy expansion stuff
I carry all mine with me at all times. It’s helpful to get to cities If my regular one is on cooldown. considering this kind of fix would take no time at all… Why not
I’d really like for all the teleport type items to be made into toys. I’d like Jaina’s locket and the Ring of the Kirin Tor added to that.
All items like that should be toys, it’s so stupid. Like the sacrificial dagger thing that kills you if you can’t get out of somewhere, that takes up a bag slot. Why? It doesn’t need to.
Would be nice if the first page of the toys section was just empty slots that you either clicked or dragged the icons into, so that you could organize that page with your most used items, and it can be placed in any order you pleased, being untouched by the alphabetical filter list.
Even with my favorite items favorited, the toys are just all over the place, and even one dedicated page to customize would be huge QoL change.
I’d like to add:
Seriously, this should have been a toy.
WoW needs to do what the Everquest games do. First of all they have bags the went up to 44 slots last time I played, but here’s what I like best. You can put empty bags in each slot of a 44 slot bag and fill up each bag. That’s a lot of space.
So if wow would add that feature I would be ecstatic.
There’s also
Cloaks of Cooperation
Ruby Slippers from Karazhan
Various teleporting rings