I attend mass and volunteer at the Shrine regularly.
The Director of Liturgy once referred to the mosaic as “Christ in Majesty”. Some laity have been known to refer to it as “Angry Jesus”.
The Shrine’s aesthetic appeal - and public perception of it - is rather interesting. Everyone talks about how beautiful it is, but not everyone feels that way. I’ve spent a lot of time trying to reckon the divide. i think, if you really look at it on the whole - the immense size of the Shrine and the fact that is built of solid stone seems to be what make it so impressive.
Stylistically, it seems to help if you understand a few things. The Shrine was constructed in stages over a long period of time, and it was technically only completed about two years ago, when they finished the central dome, which is really beautiful. But the problem seems to have been- during all this time the church was in a state of flux; and, yet, the mission of the Basilica, which is intended to facilitate a universal audience, uses a “Neo-Byzantine-Romanesque” style to host a wide array of international and provincial chapels.
The modern aesthetic solution to supporting such a wide variety of cultural styles would have been to establish a neutral, even minimalist, environment, which would not aesthetically “compete” with such a diverse set of cultures. You can see this, for instance, if you go to buy jewelry, which is best set against a light gray background to make it stand out. I’m not sure how “Neo-Byzantine-Romanesque” (which sounds and looks like an oxymoron) was chosen, but the main theme of the church is our “universal call to holiness”, so I imagine it probably had something to do with reconciling a divide between eastern and western cultures, preserving original iconic styles, and so on. Also, it might help to bear in mind, the Shrine was built over the course of the 20th century, when a lot of art was very much in a state of flux - the “strict” TLM was changing to the “lovely” Novus Ordo style of liturgy, technologies were changing, and as a construction project the Shrine was a huge, long, costly feat.
As laity, there is virtually nothing we could do to change the way it looks; and, even if we could, there’s always going to be someone who wouldn’t want to change it because they think it shouldn’t be changed. So - whatever the case - we can’t judge by appearances in this instance, and our posture must be one of acceptance.
There are some parts of the Shrine I really love, but - that said - I can understand your point of view.