I went back to watch the Mario Maker 2 trailer, and it seems there's gonna be SO much more cool stuff to experiment with.
Slopes, Cat Mario, Air Blowers, Water Level changing, Manual autoscrolling, Boom Boom, Switch Blocks, Clear Pipes, 3D Land/World enemies and elements, Angry Sun, Snake Blocks, Stompable Piranha Plants, Total coin counts, Extendable path blocks, Background Bullet Bills, Climbable Fences, 10 Coins, Weight-based tilting platforms, Parachutes, Multi-colored Pipes, Multi-colored Yoshis, New Backdrops, Banzai Bills, LUIGI (possible 2-player mode?), and of course, many returning elements from MM1 (Pink Coins, Fire Clown Car, etc.)
All in all, it looks like it has everything that made the first Mario Maker amazing, and expanded upon it immensely. It honestly looks phenomenal, I'm definitely buying it. And it comes out so soon too! 4 Months away!