I'm actually glad they are converting to Zen. It's always been a pain in the ass for me to figure out the real money cost of items on the C-Store with $1.00=80CP. Now, with $1.00=100 Zen I can tell at a glance if a ship is 2500 Zen it will cost $25.00, etc.
Plus we get to go back to just giving them money and getting the points to spend instead of the extra step of converting it.
On another note I hear the .5 Sovereign is supposed to become available before season 6 which means we will likely be getting it soon (the actual meaning of the word not Cryptic's in a sense of a larger amount of time meaning).