Agreed
But I think there may be more to it. I don't think just cold temps are the culprit. I know I am inferring something here, but don't forget the additional plumbing in GE/PW in itself may be a bottleneck under certain circumstances. What's missing here is the "unseen characteristics" of fuel.
Now that may be some red Herring to "exonerate" the Trent, but I have to doubt it.
What hasn't been addressed as far as I know is the possibility that Fuel at very low temps, infused with some concentration of hard small "particle ice", may be behaving like a colloidal suspension rather than a homogeneous fluid. If that is so, centrifugal force, gravity and pressure would make Fuel behave like a "slurry". At certain shape and minimum size, a deposit of powdery water ice could cause all sorts of problems as it changes location, hardness, and size at will. Think "Plaque".
Just as most engines have a "bypass" for oil past its filtration, to continue flow, doesn't the Trent have an FOHE bypass? For Fuel? To avoid a plug and keep the injectors happy?
AF