If they didn't need them, kind of wish they had been released in a way that'd allow for making an online collection that can be used for apps/websites. Right now all I could find were some Discord servers that'd let you use them on that particular platform or something like that.
The only important function of emojis should be to display the same idea or emotion to the viewer as was intended by the person who sent it. We're in a much better state now with all the emoji sets slowly converging to look the same, compared to years ago when Samsung's grimace emoji looked constipated[1], or their eye roll emoji looked like a cute smile while everyone else's was clearly a sarcastic eye roll[2], causing many a miscommunication.
The blobs were nice in a vacuum, but in most usages they weren't an accurate reflection of the intent of either the person sending them, or what the person seeing them was supposed to see from the sender. They made the right move switching away.
I _loathe_ the Teams emoji, but then again the entire application is utterly awful.
I'd much rather use these openmoji in something like Slack or Matrix.
Their tongue out emoji (which I use quite frequently) looks ridiculous. Pretty much every emoji set has a neutral looking face with the tongue out, indicating a very slight amount of unseriousness. Meanwhile the Teams one has big anime-esque smiling eyes that looks straight up goofy.
Also their thumbs up has such a fat hand you can barely tell it's a hand or where the fingers are.
But yes, far from the biggest issues with this stupid app.
imo the best ones are on Apple, and I'm saying this as an android user which happens to use Signal (which uses the apple emojis)