AFR not lean actually - from Ljet's perspective. its job it to keep stoichiometric AFR which it is doing pretty admirably. certainly not a performance fuel map, but it is doing what is supposed to do.
am used to most dyno runs in 4th - is 1:1 ratio to the final drive (pretty close anyway) so keeps final hp & torque calcs simple. as long as the overall gear ratio is in the dyno, will do the math for you. in any case, those numbers look roughly correct. keep in mind that if you take to another dyno shop, will get different numbers - possibly close to these, maybe not. staying w one will give you a good reference point to see what tuning changes are yielding in output changes.
Ljet ignition curve is all in the ecu - the distributor is empty save for a rotor arm. only way to recurve "distributor" is to change map in the ecu - which can not be done in Ljet (or motronic) - they are not programmable.
you are right, the dash tach is usually wildly inaccurate.
i don;t think the vvt is meant to be an actual performance "enhancer". it is meant to give you clean idle. cold starts etc, then once past ~ 1600 rpm, it advances the cam to a position that any normal cam would have had for a start point.