One of the most useful elements of PA in FO3 was that it was powerful enough to carry its own weight around indefinitely. Now that they have switched to using short-lived Fusion Core "batteries", it seems to me that PA has become counterproductive. I mean that it weighs so much that once the battery runs out, the PA alone will pretty much wipe out whatever carrying capacity you have. Or else you are carrying soooooo many FCs that you can't carry anything else without becoming overburdened. It seems the natural strategy, given the scarcity of FCs, is to take off the PA and schlep it around until you know combat is imminent, then jump in and do the combat. But doing that means that between battles, you are guaranteed to be moving at overburdened speed if you want to pick up any amount of loot. (And, frankly, you absolutely WILL be needing to collect practically all the loot you can scavenge.)
Why not apply something like a solar collector coating so that the suit can at least recharge exhausted FCs to some extent during exposure to sunlight? Something to provide the player more user time before the PA becomes more of a burden and less of a combat benefit.