The best way to get the water out of zucchini is to grate it, freeze it, then thaw and drain it. Magic. Let temperature do the work. Zucchini doesn't suffer in freshness. I haven't tried this recipe but I've been making muçver for a long time, and this way works without you having to work.
Back home (Turkeyj we also cook a healthier version in the oven instead of frying them. We use only one egg, 3 is waay tooooo much. Add a shredded potato and only 1 tablespoon of flour. And I add about a half cup of shredded nutty cheese, back home it’s kaskaval, over in the states I use manchego. 350 oven for about 40 minutes or until the top browns. And then enjoy. It’s good warm and cold.