as much as the re clearing security hassle is, that is the only thing i find annoying about the C to A transfer. to me its not any different than a far E to to a far C or even D transfer in iah (sans additional security).
and as said earlier, the gates in EWR A are so close, there is no need to for early departure from the PC.
I hate the 5- 10 minute walks from term E PC just to realize that when you get to the gate, you're damn AC hasnt even arrived.