While I don't claim to know the ins and outs of the sugya, the below
Kindly describe the mistakes so I can know what exactly
If you're looking for contemporary Poskim, Rav Chaim David HaLevi (vol 4 Siman 5 at the end) does not allow one to recite the Berach ever with Shem uMalchut; Rav Mordechai Eliyahu (Ma'amar Mordechai vol. 3 Kedushat HaAretz Siman 3) seems to hold that way, as well. Similarly, Rav David Yosef (Halacha Berurah 224:21) recommends one say it bli shem umalchut upon seeing fine homes and synagogues, either in Eretz Yisrael or Chutz LaAretz, as a Chumra for Rashi's shitah that it's only BaZeman HaBayit. However, Piskei Teshuvot (224:9) concedes that one who does recite the Beracha on glamorous Batei Kenesiot and Batei Midrashot in Eretz Yisrael isn't out of line. See Mishneh Halachot 10:75.
LeMaaseh, HaRav Hershel Schachter recited the Beracha when visiting Yeshivat Elon Moreh a couple years ago. I haven't heard him speak about the sugya yet.
The aforementioned Rav Meir Bareli himself wrote an article in HaMaayan (Tishri 5771, 51-1, page 39) on this very topic. See R' Melamed's article and Peninei Halacha, as well as R' Yehuda Amichai's article for more.