I've got 3300 miles on my rig, (Bullet Electra X and Cozy Rocket) over 2000 of that with the sidecar, and I don't believe you'll find the steering effort to be a problem just as it is. I have the steering dampener, and you'll adjust to the effort very quickly and then it's not even noticeable, at least not as something to worry with.
It's a fun rig, I hope you enjoy yours.
I have the smaller front sprocket but haven't put it on yet, just don't feel like having to pull the primary to do it. It would help when I'm riding two up, but without it the rig does perform OK, one just has to keep in mind it's not gonna go very fast. Not a big deal. I also haven't done any mods to the engine, but a "stage 1" with air, jetting and exhaust, plus the smaller countershaft would probably be quite noticeable.