This little mod simply makes the grimsever one-handed again by adding the vanilla grimsever to the plugin.

Alternatively, you can revert the change yourself by editing Unofficial Skyrim Legendary Edition Patch.esp with TES5Edit. Search for this Form ID and remove it: 00053379

Learn more about unnecessary/undesirable changes made by USLEEP: http://www.dracotorre.com/blog/say-no-uskp/