Countless introductions to the silver bullet when cherry 11b's ruck wearing silkies and goretex. I try to stay as cool as tolerable like you mentioned.
The old "Silver Bullet" is no joke...i swear our corpsman put a notch on their belt every time they have to give us one.I had to Google "army silver bullet" to figure out what the hell you were talking about. I regret nothing.
Also, I tend to end up in just gloves and a merino top when I'm moving with a purpose during the winter, but the quarter-zip fleece comes on as soon as I stop and the puffy as soon as I feel like I can avoid breaking into a sweat. Like others have said, it's easier to stay warm than it is warm back up, but it's also easier to warm back up when you're not soaked in sweat.