The TL;DR version of the post is "BG 1 and 2 were 2nd edition. I don't like 5th edition, so BG3 using 5th edition means it's not BG."
We should be grateful that he didn't advocate using 4e.
Also, as a AD&D/D&D player since 1980 and one who still occasionally plays BG and BG2, I'll add my + to whatever number we are up to now indicating that the OP is ... misguided in his opinions.
