The Chinese airspace hasn't been a problem since the end of August, WiFi should work normally.
Is the internet traffic then routed through Chinese servers (with blocking of many sites)?
Yes A350 cabin looks often empty on the LHR and BRU routes but its all about the extra cargo capacity A350 has.
Is it really cargo? Or is it that AY wants to reduce downtime between the early am arrival into HEL and the big pm departure wave from HEL? I heard AY is short on equipment.
As you see in my report, I stood like 20 min at my favourite spotting location at LHR T2. I did not see so much cargo going in and out.