As designed, this is not an overpass common in this country by any means:I personally don't believe that anyone had aesthetic goals for the design because it looks like a highway overpass.
It really should not have been unexpected by neither the engineer nor the state. Full penetration welding of thick plates meeting AWS D1.5 requirements is so difficult and costly that it should have never even been an option. If these loads cracked from differential heating/cooling, I can't imagine how badly they would have cracked over time due to fatigue.
This could absolutely be done in a week using accelerated bridge construction processes, especially for such a basic structure. The piers would obviously take much longer to build, but ABC projects even here in Massachusetts have been built in a weekend.