world logos that the airlines apply to their aircraft near the main doors are decals, and not painted. They are added to the aircraft after painting is completed.
If they are missing from recently painted aircraft, it will most probably be due to one thing;
Problems in getting one
world decals to apply to newly painted aircraft, rather than an indication that Cathay Pacific is leaving the alliance.
Canadi>an airlines applied one
world logos to their newly painted aircraft right up to the time of the Air Canada takeover, even though they knew they were leaving the alliance.
As to British Airways leaving one
world, if they left they wouln't leave much behind, since they own significant shares in Qantas and Iberia. They would go too, leaving American, Lan Chile, Aer Lingus, Finnair and Cathay Pacific - all good airlines, but not much of a "global" alliance"
As for the missing one
world logos, don't read too deeply into such a simple thing! What stickers airlines apply to their aircraft are never a good indicator of future business plans