Tim,
I don’t know of any way to have an ‘adjustment layer’ in PPro. (I think that it would be very useful.) However, you can imbed your current sequence into another sequence, where it will show up as one long scene. Any effects you apply there will impact the whole timeline/scene.
OR you can open the Premiere Project in AE, where your clips will show up as separate layers. You can add an adjustment layer above the entire comp and do any global correction/grading there.
I understand that you prefer not to use Dynamic Link because of the speed of your computer. However, you might not be aware that you can select ALL of your clips in the PPro timeline and right-click ‘replace with AE comp.’ Your clips will show up as separate layers in AE, but you can add an adjustment layer above the entire comp and do any global correction/grading there.
Some of the folks on the Premiere Pro forum may be able to help more, although I suspect most of us read both forums.
Jim
ColorBurst Video