Fixing composition within composition Sequence resolution while retaining effects

Hi All,

Relatively beginner user of AE here,

Making a logo animation, with compositions within compositions due to the many effects and layers I was using. These compositions were made from imported layers of a Illustrator file I made specifically for this product. Was aiming to create a 4K logo animation, and my parent composition was properly set to this resolution. However, due to the low resolution of my monitor, I didn't see that while my final composition had a resolution of 3840 x 2160, the compositions within, and the compositions within those, all had a lower resolution of  842 x 596. As a result, when displayed in the final composition, they all have poor quality. The issue is that I have already done all the effects. Rescaling them (through both the script and the composition settings windows) causes major problems with my effects, everything goes out the window and it is almost unsalvagable. Is there any way I can get these effects to a higher resolution within the final sequence? Would increasing the resolution of all sequences at a constant proportion work? Or should I restart (Would be quite the waste of time)?

Thank you.