So much nuance, so little time. This is like a midrash of latke making.
First, my history is the same as EC's. No onion. No garlic. Why, you ask?
Potato, motzo meal, egg, knuckle-fleisch, blood. (Plenty of oil, "don't rush the flip") You can have "tears" without onion just by scraping your knuckle hard enough. In fact, I think the rebbe of blessed memory would frown on taking the short-cut of "onion tears" rather than the tears of real latke-schmerz. The grater is is the world, the knuckle is the Jew. We have to toil in the world, and bleed and leave part of ourselves there to bring the latke good works, of light (of which, of course, the oil is the symbol), so there we are. Onion tears? Tasty, maybe, but feh.
I'm not arguing for the superiority of the recipe, just validating that strain latkic thought and tradition. (Perhaps it's different for the Sephardim. I wouldn't know.)
As for the virtual "instant latke" - leaving the Rebbe out of it for the present - achieving my family's traditional texture (it's own holiday miracle) depends on not squeezing the liquid out, but on adding the right amount of matzoh meal to absorb enough of the liquid to produce a batter with all components in perfect balance.
My grandmother's latkes had a shape and consistency I've never seen since. They were thin overall (unlike the German "totalitatermen" - and let's not even go down that road), thicker in the middle and then tapered toward the outer edge until at the very outside there was a magical crunchy brown lacework band that completed the miracle of the whole experience - rich and unctuous, but then also delicate and crisp as well.
"Strange how potent cheap music is."