Hope someone (not me!) starts working on a nvimclient (akin to emacsclient) soon.
Caveats: if you depend on plugins to give you an IDE-like experience in Vim, kak is not for you. Your vim plugins won't work. If you use Windows but don't want to use Cygwin, kak is not for you.
At least surround.vim, targets.vim and a couple custom text objects.
Has been a while since I have read up on that, though.