My group and I have used Roll20 for years, and have tried several other popular VTTs without success; usually we find them bloated, clunky, or slow. So I made one for ourselves and there are now a few other groups using it.
It has all the basics in a minimal UI and is game-agnostic. It also has (completely optional) AI-generation of token and map art. Try it if you want, and if you like it you're welcome to use it.
I don't know how it's gonna evolve in the future, but I'm talking with users and making it good for them, while keeping the minimalistic design a priority.
Milan