Roei,
My workflow could be that I just don't know any better. :) However, what I generally have been doing is I take my raw footage in to Premiere first, especially if it's very long and I only want a piece. So, it's easier to review, find what i want then I extract that. So, by extract, I clip out that piece, render out of Premiere, then import in to AE, add effects, etc.
If you are referring to the dynamic link thing, I've tried that a time or two and it is SOOOO slow, it's ineffective to me. If there is another way to send from Premiere to AE, I'm all ears OR if you have another suggestion on workflow, I appreciate it.
Then after in AE, I render out my finished piece and take it back to Premiere where I render out my mp4 with sounds, etc. I can copy the preset but I just selected one of my existing ones (1920x1080) and then change the settings of that preset for the one render to 1920x1440.
THanks,
Eric