It's the same company doing the signage that did Crazy Bats too and this concerns me even more as Crazy Bats is a big time low in comparison to Phantasialand's other theming...
Fairly certain the company will have more than one type of signage in their catalogue, not to mention this is already different to the flat Crazy Bats sign considering its 3D, metal instead of plastic and it appears the letters will be lit up from behind.
As for the wall I'm a little concerned too, especially since it sits directly beside the great looking Universal Rocks brickwork on the left, however its not done so I'm not going to write it off just yet. One would guess more metal elements and framework will be attached to the surfaces either side of the sign and hatch element for a more detailed appearance.
However to clear up mentions of brickwork and paint to point out - this is Weathering/Corten steel. The rust look is clearly intentional. If it was Universal Rocks theming the structure would have been left bare as was done with the section of brickwork beside it. Corten steel is a group of steel alloys developed to eliminate the need for painting, and forms a stable rust-like appearance after exposure to weather.
To demonstrate how this effect has already come a long way this is how completely different the steel looked when first added. The oxidation of the surface can typically take months however they've been speeding it up by spraying it with a Rust Accelerator solution.
Corten steel has also already been used for sound barrier along the side of the Wuze Town building. from within Rookburgh its appearance is broken up by large steel frame/gantry pillars but in some pictures you can make out that smaller metal theming pieces and framework have been added across its surface as well. Most importantly however this wall's rust effect appears much darker. So I'm hoping the rust effect for the hotel entrance portal is not yet finished and with more weathering over time and potentially treatment will also turn darker. Add in some more theming pieces and hopefully it will form a more pleasant overall appearance. But who can say for certain, maybe this is the wall where they just run out of money - as with everything we have to wait and see...