Well, I have to say that most things look better in Conquest so I'm not surprised as it's an awesome reosurce pack - just like how renders and shaders may make it look better, for instance (although I feel lighting should already be a little more epic to start with because I love lighting effects so it is a bit bothersome that shaders are the only way for it meaning many don't get it at all (rambling)) -, but focusing on the building alone, I guess general feedback would be things such as giving the rooves on the houses and structures throughout the city more overhang which is supported by blocks which mesh well with it - red and brown don't go that well together and Minecraft is a game of blocks so you'd need to take a slightly different approach to manage that, like using the same block as the roof for supporting it, or perhaps something like a jutting out log which the roof rests atop, using a trapdoor at the end of it to add depth to avoid it being a direct brown/red clash since depth avoids the colours directly clashing like that. Various things like pillars along the walls to break it up with details and more colourings can also give more to look at for them and make them seem sturdier if supported well too, and uh honestly I think the castle could seriously benefit from some flags waving in the wind but that's not advice and just me giving a personal opinion as it looks like a castle which would have flags. XD Personal view entirely.
Uh, well- I guess I just rambled because you said feedback may be appreciated so- Hopefully that helps Donky, if it were to be seen.
And you're welcome for my comments and for my honest opinions. :) Glad to know it was nice to hear.