could you offer any insight on how wotc got it in their head that the most fey thing in the world is teleporation for some reason?
A fuzzy association between fairy creatures and teleportation has been floating around in the game's DNA for decades, mostly because teleport has historically been a common default pick when writers were trying to fill out a medium-to-high-level monster's list of spell-like abilities, but what really codified it was 4th Edition's strong emphasis on positional play in combat. 4E's designers wanted each playable race to have a distinctive identity in the context of positional play, so dwarves got resistance to forced movement, elves got to ignore speed reduction for difficult terrain, halflings got an AC bonus versus opportunity attacks, and so forth – and eladrin, 4E's flagship Otherworldly Fey playable race, got a once-per-encounter teleport.
Basically all of that "each race has a specific positional play shtick" stuff got walked back in 5E because it wants to pretend that it meaningfully supports theatre-of-mind combat (it does not), but the idea of fey creatures having teleportation as their signature Thing seems to have resonated with players, so here we are.
