Yordles being a subrace of Vastaya makes no sense
It makes sense for them to be similar races seeing as how they're humanoid-animalistic fae races, but yordles were around first.
Yordles were before humans (look at Gnar), humans were before Vastaya (The Vastaya were a chimeric race, the originals having once been humans), yordles can't have been an offshoot of Vastaya.
So calling yordles Vastaya doesn't add up considering they were around before the Vastaya. Xayah, stop telling yordles to do Vastaya things when they aren't Vastaya.
:P