Your system operates well, and it if fails, the key can still be used to operate the bike, right?
But if you add a steering lock that can lock without the key, what happens if there is a failure of any kind while you are riding? I prefer not to have the steering lock while I am moving.
Yes the original key can be used as a back up to turn the bike on. This is also part of the reason why I never added the steering autolock feature; it seemed like too much work without much benefit.
However I will say that it still is a plausible idea. The bike's original ignition could be relocated to somewhere else on the bike so that you could still use it as a back up. And as for locking while riding... I wouldn't worry about that because it's just not possible for two reasons...
First, the steering lock can only engage when the handlebars are turned hard over to the left. Second, the keyless system is very secure. Once you start up the bike and pull the brake lever, the system goes into "sleep mode" which means it's basically locked in the ON position. Nothing can turn it off other than pressing the ignition button again. Once the ignition button is pressed to turn the bike off, the system will "wake up" and will start responding to the fob again. This means it's not possible for the bike to accidentally turn off while riding or accidentally lock the steering. I wanted to mention this in my video because it's an important safety feature but I thought it would take too long to explain so I cut it out.
So the steering autolock is totally possible to do in a safe manner but like it said, it's a lot of work to implement and so I didn't feel like it was worth it for me personally.