It probably can benefit from a peat-bark mixture like 5-1-1 or any ratio, peat would hold more water. You could use burlap to wrap the pot, even the bush itself. it will not need light soon if not dormant already. Also it may lose leaves even if they say it doesn't. So don't worry if that happens. I suggested other methods also so did Al, so whatever you want to do. If dormant it will stop growing. Even if dormant, if it dries completely out it could die. Too wet too! Sounds like your soil mix is losing a lot of water. I doubt the plant is using it. If it has stopped growing, I'm sure it has, you can repot it. Buy some peat and mix in exisiting soil and put back in the pot. I'm watering mine about once every 2 weeks now. Staying moist at least that long. Also if temps drop below freezing it will be dormant at that point. If you repot you can check on roots, see if healthy or brown and rotted. i can't imagine even in pure bark it needs water daily. That is very strange. Is it a clay pot?

Blueberries vary according to variety, in how high and wide they get. Lowbush varieties tend to spread laterally, but they only get 24 inches high. Highbush varieties like Patriot can get 10 feet high, by 8 feet wide. This takes about 6 years to achieve. One of the southern varieties, Rabbiteye, is said to get 12 feet high. Blueberries require soil pH in the range 4.5 to 6. It is easy enough to set them up in proper soil, amended with compost or peat moss to raise the level of organic fiber. However, they do require watering, and if your groundwater is high in lime, this will raise the pH over time, and the blueberry shrubs will suffer from iron chlorosis. The roots can not absorb nutrient in soil with a ph much over 6. Drip irrigation is recommended in the southern USA, in areas with low rainfall. Is there any chance that you could visit a blueberry grower in your area, and ask questions about the local conditions?

Wonder if you ever found out the problem with your blueberries. It might be that the location may be too hot. I find that part shade [dappled] to full shade seems to work the best for the blueberries. Blueberry leaves will fry in the full sun here in our desert climate. Make sure that they are planted in very composted and acid type soil. Water several times a week. I also provide overhead spray for humidity.

This is the container soil mix recommended by the above touted Dave Wilson Nursery specifically for blueberries: 1/3 1/4" pathway bark 1/3 peat moss 1/3 forest byproduct-based potting soil (azalea mix or acid plant mix) 1 handful soil sulfur per plant. Nowhere in that combination is "actively decomposing organic matter". In fact, that mix is a pretty durable (non-decomposing), long term container mix and the potting mix the OP proposes is very similar. And there is also nothing in that mix that supports the populations of microorganisms required to process non-water soluble organic fertilizers, either. Drew, we've been down this road before, both here and on the Container Gardening forum. You have yet to link to any of these 'studies' that acknowledge the benefits (or even the slightest effectiveness) of using organics in a container situation despite countless other posts and scientific data that state the opposite. Yes, there will be some nutrient release from the organics - its hard to get away from microbiology completely - but not to the degree where the plants are receiving all the nutrients they need to flourish just from that source. btw, much of my background in growing blueberries comes from a professional association with Fall Creek Nursery in Oregon. Fall Creek is the largest wholesale grower of blueberries in the country, supplying much of the stock sold at nurseries elsewhere. Wouldn't be at all surprised to discover that they supply Dave Wilson with their starter plants They are not a fruit tree nursery - they are blueberry specialists - and are responsible for many of the newer introductions on the market, like the Peach Sorbet the OP is growing. I trust their growing recommendations implicitly - it's what they base their business on.