If there is such an abundance of extenstively details answers on the forums, can't you simply copy and paste a few here? I have read though a lot of the stuff being posted; I don't see it. So again, please paste a few of what you think are "detailed" explanations of what should be done so BG3 resembles the originals.
Another poster who seems to agree with you at least gave such reasons as darker colors, no beaches, and dismemberment as examples of what they mean. I have yet to read anything specific from you, in any of your posts. The best I can find is you think TB will create a more cramped space, which is just asinine. In fact, Larian's system of including the ability to climb and jump does the exact opposite (which doesn't necessarily have to do with TB ... cramped or open spaces has nothing to do with TB vs RTwP).
You mention that this your chance to reach the devs to affect change. Good! Do so. What would you suggest? Based on a quote you posted, they already think they are doing so, so you need to do more. You need to exactly state what you think they should be doing. Help them understand, in excruciating detail if needed. Give examples of what the gamplay should be like, what the environment should be like, what the vibe should be like, and what visuals should look like (using the general categories you mentioned). Elaborate man, or at least, repost here or link to other threads wherein you think you did so.
You are asking for things that have already been done plenty, and will continue to be done. You are not Larian and are not the target ear, yet even you have been catered to. But you just pretend you haven't seen anything. If that's the case, maybe ask a doctor for an eye examination? I see that you are just arguing and denying for the sake of not wanting to acknowledge the legitimacy of people's criticisms.
P.S. No, having a jump feature doesn't stop the environments from being cramped. They are still cramped, per DOS TB style. And if you had actually played BG 1 and BG 2 you'd know how ridiculous it is for you to claim that Larian's TB environments are anything but cramped to accommodate the TB gameplay. It's an assertion that's beyond silly.