Good choice, Lyrik is great and the DT wheelset with the 350 hubs is better. I guess it will come with the 18T star ratchet but you can upgrade it to 36T any time.
Yes, Zee is i-spec B, I'd go with the HB clamp. There are some adapters but the HB clamp is slim and you can independently adjust it from the brake lever.
E6000 switch is 'plug and play' it's an easy swap.
Thanks. As per other post, I've gone for a different lever with i-spec b compatibility as I prefer to keep things simple.
Re the DT Swiss wheels, the e-mtb range ("Hybrid") come with a 24T ratchet specifically designed to cope with the extra forces of e-mtb. Whilst this may be hype(?) I believe that DT Swiss make some of the best hubs & rims on the market, and the wheels were a key reason I ordered the 'older' model even though a newer one is out.