Rabbi Shai Piron is a respected rabbi in the dati leumi world.
I don’t know if he is related to the famous Rav Piron, who was chief rabbi of the IDF, and who does interreligious work.
Yesh Atid’s Rabbi Piron seems to have shifted from the more Hardal perspective to a more liberal one on renting houses to nochrim in E”Y. Truthfully, those like R’ Aharon Lichtenstein and Rav Elyashiv, who opposed the ban on renting to Arabs, are merely citing the Rema. Furthermore, the Rambam said that Muslims aren’t ovdei avodah zarah.
Those who restrict renting to Arabs are acting with safety in mind, and I respect this. Also, there is a Ran to Sanhedrin 61, IIRC, which says Moslems are baalei avoda zara.
Chances are R’ Piron used to be a real Tzioni and now he swallowed the Meimad mentality.
Left wing dati politics in Israel are nothing new. Moshe Unna in the 50s, Rav Michael Melchior and Rav Yehuda Amital with Meimad, and now, Yesh Atid rabbanim share much in common.
You’re going to see closer ties between Rabbanei Tzohar and Yesh Atid. We really need an approach which: helps improve relationships between the secular and Yahadut, by rebuilding a Tzioni-style Rabbanut like R’ Uziel and R’ Goren, while embracing commitment to the ideals of R’ Goren- no land for peace, support for the chalutzim, Jewish sovereignty over Har HaBayit, economic liberalization (ie/less regulation), no prisoner exchanges, etc.
I generally support Manhigut Yehudit in Israeli elections, although I am also sympathetic to some Kach ideas seen in the National Union, while hoping for a more moderate approach to state religion.