As DAZ have just extended their sale until the 30th of April, I wouldn't expect anything major before close to or after that date.

Nah. I think they were planning that from the beginning. Remember, they said if we bought enough stuff, we could make the new low prices permanent. I suspect they were planning to do that all along. How much you want to bet that on April 30, they will announce that sales are so good they're extending the low prices some more? Just like "temporarily" free Aiko ended up being permanently free.