Yes we have had all the fashion style ponies so far - at the moment just missing the Rainbow Rarity [although she is coming] and some parts of Europe did not get the Shining Armour/Cadance double pack.
As to whether we will get another wave? I agree that they are popular and the continual release of at least a couple of ponies in that size within each line is probably going to go on. However, the pattern of when and how which character release is impossible to determine.