Use -allowconsole -log -autodebug on a shortcut target and then \ to open the console (UK keyboard)
Many of the original XCOM commands appear to still work, many are broken -
http://wiki.tesnexus.com/index.php/How_to_DIY_common_mod_solutions_-_XCOM:EU_2012
The main one for me is "slomo #" - typing in 'slomo 2' will double the animation speed. I'm finding that helps offset the subpar FPS.
Currently figuring out how to bind them to a key.
E:
Can confirm that adding (noting the removal of periods at the start of the lines) -
Bindings=(Name="NormalMotion",Command="slomo 1 | SetBind F FastMotion")
Bindings=(Name="FastMotion",Command="slomo 2 | SetBind F NormalMotion")
Bindings=(Name="F", Command="FastMotion")
to Steam\SteamApps\common\XCOM 2\Engine\Config\BaseInput.ini
allows F to up the animation speed only in the menu. I've been trying many different keys and the all seem to have no effect in-game. I'm assuming is something somewhere else consuming the input.