This is quite the nightmare during the afternoon peak hours when it's essentially 20-25 minute headways for those going to or from the train station. We ended up walking from P4 to C and in total it took us 40 minutes from getting off the NJ Transit and walking into the Pre-Check line, and this was with us catching the first tram from the train station.
They really should just run busses from P4 to the train station to avoid the current situation where everything at P4 takes places on the same platform, as to why they're using the same side I assume they're forced too with the maintenance.