Breaking in a new brush is a process that can take time... pretty much any shaving brush needs to be used to blossom into it's full potential.
Take for instance my latest piece of loot; my Vie-Long 14033 mixed horse-badger brush. I've only used it twice so far - one shave and one hand-lather - but allready it's starting to open up and bloom more. In a few more days I'll get an even better idea of just how well this brush will perform - it allready feels softer and holds more water than it did out of the box.
Sometimes, it seems, you have to break things to fix them.