Caster will make a pull, but almost no uneven tire wear on the ribs. Camber will make a pull, makes uneven wear pattern. For toe, I have to second Gary, if assymmetrical it centers itself anyhow but makes the wheel off when it is supposed to self-center.
Anything with .5° increments will be feelable even when symmetrical and would definitely cause a pull. If readings are correct, we may assume your toe is dead on. 0.2° of Caster difference is not too much -might be an issue on a glass surface. 0.8° camber diffierence is (I think) what is wrong solely.
The "unadjustable" camber or caster on some cars are adjustable via dissassembly and inserting/omiting washers after careful measurements. If this is a case, I'd prefer an authorized BMW service. On the flipsidethis makes the adjustments more reliable during the operation will not get off at every small accident such as hitting the curb.
If with any possibility you could adjust the casters to the ~8° s steering will be slightly heavier at speed, may be heavier in the city too and you'd get more directional stability. Breaking the rear sooner via sudden steering would be expected too.
sorry for the below screw-ups. I need to re-adjust to the presence of the quote buttons : )
