Awfully awful move names.
You're not the only one to think that. Fans are making fun of the names by posting move names like "Leafy Leaf," "Muddy Mud," and others.
I realized these move were references. Splishy Splash is a reference to Surfing Pikachu while Eevee's new moves are references to its Kanto Evolutions.
But yeah, we've had MUCH BETTER exclusive move names in the past.
I made a Youtube video after seeing the new moves in the trailer that further explains my thoughts. It's called "My Thoughts on the New Moves In Pokemon Let's Go."