1) The Red & Blue sprites are the sprites that most people associate with Gen 1. They are also, in my opinion, far better than the Yellow sprites. Maybe you like certain Yellow sprites, but the most iconic sprites are from Red & Blue.
2) The changes that Yellow brings to the metagame are negligible (quiet Pinsir fans).
3) ADV uses the sprites from Ruby & Sapphire, despite allowing Pokemon & moves from FRLG & Emerald. No, it doesn't use the Emerald sprites (see Snorlax).
4) Using Tampermonkey is a cumbersome middle-step, that newbies/casuals/spectators will not be aware of. Also, it does not work in the teambuilder.
2) The changes that Yellow brings to the metagame are negligible (quiet Pinsir fans).
3) ADV uses the sprites from Ruby & Sapphire, despite allowing Pokemon & moves from FRLG & Emerald. No, it doesn't use the Emerald sprites (see Snorlax).
4) Using Tampermonkey is a cumbersome middle-step, that newbies/casuals/spectators will not be aware of. Also, it does not work in the teambuilder.