Hi !

Acknowledgment
This is my first post here so I don't know if it's the right place to post it but I give it a try.

Context
When changing Brush presets, opacity brush goes back to 1.0 or goes to opacity in the brush preset, no matter the previous value.

Feature Requested
Having the possibility to check a "preserve opacity" checkbox near the brush opacity settings in the toolbar, to preserve the user defined opacity even when he changes brushes.

Thanks for listening

You can lock brush-settings in Krita 2.9.

This is done via the brush-editing menu, right-click the lock-icon above opacity, and it should 'lock the opacity'.
Now the locked opacity will be carried around for each brush you use.

Oh !
I will download the beta to see that right now

Thanks !!