Is it still sovereign?

Yes

What about the Maduros?

They are kidnapped by the US empire. Now, the battle for their freedom will be a diplomatic and legal one(this will depend highly on the support of our comrades in the USA).

Who is in charge there and are they kowtowing to the United States, doing a bit of both (their own thing and pacifying the United States), or are they resolutely against USA influence?

All of the political structure remains intact so there was no regime change. What they are doing is what they have always done when Maduro was in Venezuela which is to negotiate with the empire. It is the only viable way because the actual material conditions does not allow for an aggressive confrontation of any kind.

Are there still air strikes?

Fortunately no BUT there is still a naval siege in Venezuela. The USA, like a pirate, is stealing oil tankers off the coast of Venezuela.

Edit: typos