This mod exists primarily because I didn't know about that control.
I originally wrote this mod under 1.1, where that control didn't exist. When 2.0 came out, I updated my mods to 2.0, including this one.
I swapped my hotkey to the builtin control for the last couple weeks to see if there was any noticeable difference. The main differences I noticed are cosmetic only: the sound effect of the toggle, and the error message when too far away. The mod version also doesn't handle locomotive auto/manual -- because I never considered that.
I'll likely use the builtin control from now on. I scanned through the official Changelog, and I didn't see any references to this new builtin control. Thanks for pointing it out!