Reply To: chazaka meiikara

Chiddush ha’olam was by no means introduced by the nefesh hachaim. As Laskern pointed out, we say it in the 1st bracha of krias shema both by shachris and maariv. See abudraham on the bracha of ma’ariv who points it out. It’s also mentioned in Midrash Tehillim 119 85, although maybe it can be understood differently.
The nefesh hachaim calls it a tenet of our faith.
As far as the gemara in shabbos, the rishonim explain it differently than the maharal. I don’t understand the Maharal. Why is saying hallel on teva worse than reciting a bracha on teva?

Ubiquitin and Gaon, besides for the fact that chiddush ha’olam is mentioned in the brachos instituted by the anshei knesses hagedolah, as I mentioned, I’m not sure there’s anything “backwards” in posing a question on an earlier source based on what a later source says. See, for just one example, baba basra 81b where the gemara questions a beraisah based on what r’ zeira says.