It's too weak. It needs to be more versatile. Maybe even allow airbrush to be enabled so the blur effect can build-up like water on a watercolor painting.
It's 2021 (nearly 2022, and we just had a major software update) and Adobe STILL hasn't updated the blur brush tool. It's both incredibly useful and incredibly annoying to use because it's so weak.
And no, using a blur filter and layer mask is NOT the same thing at all. Maybe with Lens Blur and layer mask to feather the blur, but man that's WAY more work than it should be. The current blur brush tool needs to go to 1000%, relative to it's current power.
Adobe, please PLEASE make the Blur Tool stronger -- currently to get a strong blur effect in a small, precise area, we have to try to make a perfect tiny selection and then use a Blur Filter on that tiny area -- pixels always get left out, the selection gets messy, it may be too small to feather or blend effectively -- just let us choose a precise brush shape and size within the Blur Tool and use it wherever we need with a real choice of strength and the ability to blend the edges like we can with any other brush-based tool. Please please please, this would help SO MUCH! Thanks!
Adobe, please PLEASE make the Blur Tool stronger -- currently to get a strong blur effect in a small, precise area, we have to try to make a perfect tiny selection and then use a Blur Filter on that tiny area -- pixels always get left out, the selection gets messy, it may be too small to feather or blend effectively -- just let us choose a precise brush shape and size within the Blur Tool and use it wherever we need with a real choice of strength and the ability to blend the edges like we can with any other brush-based tool. Please please please, this would help SO MUCH! Thanks!
It is 2023. Please fix the blur tool. It is functionally useless to digital artists unless we work at super low res. A blur mask doesn't work for what we need, and neither does the smudge tool. You've needlessly handycapped artists for years at this point, and if I could I would honestly let my subscription lapse in favor for a company that actually listens to their consumers.
The blur tool is one of the original Photoshop tools that were there at the very beginning. It was made for direct pixel editing ("destructive") on the small files in use at the time. Now the focus is on re-editable ("non-destructive") tools, and the blur tool got left behind and forgotten. That's not a reflection on merit; just a factual description of Photoshop development.
Now, I do use it myself, I do keep it in my toolbar. But I find it mainly useful for fine-tuning masks, not pixel content.
The main problem with the blur tool is the lack of precision. You can't set a radius. I don't know if it's "gaussian" or "average". In use, it's like pouring from a bottle - you just keep going until you have enough. To really improve the blur tool, I think it would take more than just widening the neck of the bottle.