Yes. Paris is symbolic (not as to say that symbols don't matter, they do). I don't think that staying vs leaving would change much of Trump's 'environment' politics.
The only think that is interesting (to me) is how voters will react to it.
It'll likely galvanize pro-climate action voters to resist the Trump administration even more. Already states are picking up the slack now that the federal government has abandoned us (see other thread).
On another note, where's Nuclear Elmo? This is the closest Trump has done to end humanity and life as we know it, only by carbon summer instead of nuclear winter.