Really, I highly doubt they ever adopted this mentality or stated such in an outward fashion. Are things inconvenient for the EU due to the time difference? Sure they are and I sympathize with you guys. What they provided was something that people have been asking for forever in WoW, a singular client that allows EU and US players to play together if they so wish.
Unfortunately, things just didn't work out with a single client. I wish they would have executed it differently, or at least decided to operate separate clients but not limit usage in one continent to a specific client.