I've seen a number of posts about instep crampons that have concerned me. I've have a couple pairs which I've used on several occasions.
My experience is that they are useful in one particular situation: When you are hiking on a trail that is fairly level, that has patches of ice, which, if you were simply walking in boots, might subject you to a slip and fall.....but you'd fall only to the ground, in place.
I think that would be fairly useless when you got significant angulation to the trail, and I'd not trust them, on a slope with serious runout below.
In mountaineering circles, the ice axe comes before the crampons. In the Sierra Club, for example, if you need an ice axe on snow, it is defined as a minimum of class 3, if you need to ADD crampons, it is minimum class 4.
My biggest concern is that crampons will allow a person to get themselves into a position where they are in a lot more danger, than if they were not wearing them. An axe would be the tool to deal with that danger, but you'd have to have it, and know how to use it, to mitigate that danger to a reasonable level.
So, to the specifics: On the main trail, now, you might find instep crampons useful to follow the trail, assuming the trail is broken, and you are not on frozen snow, up to trail camp. You might find them useful on the switchbacks, once a trail has been established on the snow on the switchbacks. However, I'd generally be pressed for a real use for them on this mountain.
Your milage may vary.