"…mixer AoT is not possible as it was the only way we could fix it …" (the plugins windows disappearing behind the mixer)
Qt does support z order stacking, please implement it. Arranger 0, mixer 1, plugins 2
void QGraphicsItem::setZValue(qreal z)
Sets the Z-value of the item to z. The Z value decides the stacking order of sibling (neighboring) items. A sibling item of high Z value will always be drawn on top of another sibling item with a lower Z value.
If this is too much to ask, for reasons that only the dev team knows, at least give us the option to deal with it, just like before. This is a must for users with 1 monitor setups.
“We have more than 1000 items on our FR list”
This is irrelevant, since we’re not talking about a feature request, but a feature that we’ve all paid for which has now been removed without a proper replacement.