The devs didn’t make a mistake by not having guild banks in vanilla, they had plans to release it and it got postponed until tbc. But that doesn’t mean player homes (aka garissons) should be in vanilla classic because those were planned as well.
Guild banks didn’t come out until tbc, so they will be in tbc classic. Dual spec didn’t come out until wotlk, so they will be in wotlk classic. Let the classics be what they are supposed to be, stop trying to change them. I stopped pushing for guild banks for vanilla even though I thought it would be a good addition because it doesn’t belong in vanilla.
So give your feedback, but don’t try and make your opinion out to be “our” opinion.