Speaking of which...
I truly despise hidden signature abilities.
Granted, Gale Wings Fletchling is a bit too much for in-game, but Propeller Tail? Grass Pelt? Give me a break.
On the topic of HAs, I’m assuming the reason they didn’t get propeller tail is because they wanted to keep it exclusive to Barraskewda line. This does lean to another point I dislike about Pokémon designs these days: It seems that most Pokémon starting from Gen 6 onwards has to have some signature move or ability, at least at the time if it’s debut. Heck even Spidops has a signature move despite being clearly designed as an early bug. It makes the concept of Signature move feel special and just feels like a sore attempt to make each Pokémon unique.Speaking of Propeller Tail, Buizel and Floatzel have an empty ability slot and tails that are literally propellers. Why didn't they get Propeller Tail?
And lastly, it’s the odd that the Galarian Kanto Birds don’t have HAs while their Kantonian ones do, not to mention their abilities aren’t even unique; yet the Tapus and the Loyal Three have HAs despite having signature abilities.