Yea, the two loftwing statues and giant Hylia statue are clearly different from the two loftwing statues and giant Hylia statue. Clearly not a result of a new system's hardware and game devs taking the opportunity to improve upon the image or well over 10,000 years passing since Ocarina of Time and even more than that since Skyward Sword. Btw ever seen any Loftwings is the tens of thousands of years since Skyward Sword? Yup. Clearly unrelated. No chance in hell it is the same shrine as this game would depict it.
The Hylia statue in particular... the size of it was important to it's role in SS, and they would ensure that was preserved in BotW if it was the same statue... if anything they would have used the more powerful hardware to make it even bigger in BotW, not substantially smaller... that would contradict the very argument you're attempting to use.
As for the Loftwings, if you read what I said properly, you'd see I was placing the construction of the Forgotten Temple at an unknown point between SS and OoT, so there could very easily have still been knowledge of Loftwings at the time... plus, I also implied that they would have had the statues from the Sealed Grounds to work from, so they technically wouldn't have needed any knowledge of Loftwings themselves.
And I'm not saying the two temples are unrelated... I'm saying that you can't say anything more than that... they are related, but they're not the same temple.