I’m unsure whether a drop-in replacement exists. I use Lawnchair. It doesn’t have the newsfeed when swiping left, but if you’re okay with changing your flow a bit it could be good (enough) for you. You could create something with widgets (or maybe plugins) that replicate what you currently have.
I’m pretty sure there might be some arcane scripts for you that would help you. But you should clarify query a bit. What are the weird issues you’re running into? Alternatively, if you’re managing nginx and letsencrypt manually you could try: