I also received an orphan Leaf with those massive decals. They are way too loud indeed :)
I went by the local Pep Boys and got a sticker remover product from Goo Gone. It came with the plastic wedge piece to use on the corners and was very effective.
One tip I would say is to get some sun on...
We are annual pass owners so we go fairly often. Living in LA we would probably need charge station there to ensure we can get back (depending on traffic).
Of course with Chevron still a major sponsor of the Autopia ride they seem to be happy with some parts of the park being not so eco...