It would be interesting to have the filter view filtered based on the patch tab you are.
For example, you have fixture a (un patched) and fixture b (patched) in your patch list.
While in tab “Fixtures”, the filter contains all fixtures type (a and b, as today).
While in tab “Patched Fixtures”, the filter contains only fixture B because the fixture A is un patched.
It will really ease patch reading and working when you have a lot of different fixture type based on your different shows performed previously (case of touring) with a lot of them unpatch, and keep for history the day you need to patch them back.