Starting forward on the toes and finishing forward on the toes are two separate issues.
Starting forward on the foot is fine if you’re trying to get some more quad involvement, but at probably mid-shin with your pull you have to shift back on to the heels.
This might be a matter of opinions, but I think it’s a lot better to simplify things and stick with focusing on the heels. Trying to shift from front-to-back disturbs the proper movement pattern and the last thing one needs when pulling heavy shit, is to worry about that as opposed as keeping perfect form throughout. If he wants more quad involvement, that’s what the squat is for…
Just my opinion.
I think you completely missed the point of that post with regards to the weight transfer from toes to heels.
I think you’re confusing quad involvement with quad development or else your point about quad involvement with squats makes about zero sense.
Involving the quads on a conventional pull at seperation from the floor is a technique that some both OLers and PLers use. These lifters can get more momentum started with their quads and then are able to transfer weight to their back half much more effectively and as a result have a better leverage to lift heavier weights.