If you could create a new religion, what would you include to make it wholesome, interesting and helpful for the world?

Buddhism isn't dogmatic about cosmology/theology, but there's a lot of it there. Most likely as a hold over from Hinduism, as teaching using the ancient Indian conventional worldview would have been a skillful means for the Buddha and his disciples.

That said, in that cosmology, the Hindu gods live in the Deva realm. Time there is much slower but they still do age (impermanence) and die, and cycle into lower realms if they don't awaken. A being can be both a Buddha and a Deva. Just as Siddhartha was a Buddha and a Human.

An example of this is Amitabha, the Buddha of the Pure Lands (a Deva realm). This is a Buddha that many east Asian Mahayana Buddhists take refuge in, as Amitabha made a vow to hold space for people to practice and achieve enlightenment.

Amitabha isn't worshiped the same way Western religions worship gods. The outward customs look similar. Offering incense and stuff like that. But the goal is gifting. It's giving something to someone you value or love, similar to taking care of the monks and nuns. And gifting is considered a spiritual practice (because it is, giving something with no strings attached or expectation of reward nurtures joy, compassion, etc.)

Amitabha doesn't get mad and kill all the firstborns if people don't give him gifts in other words. That's the difference between worship and devotion.

Reading your above comment you might like Burning Man too. The principles provide similar guidance to religion. A lot of Burners are into meditation and stuff like that. A lot of us are also into drugs, loud music that goes all night, and carnival level art spectacles. Which isn't everyone's jam, but it's a very loving community based on anarchism and making art.