I think going up only to 46T is an epic mistake. I was looking forward to see the product announced and maybe buy it, but I am really disappointed. It makes zero sense they limited themselves in that way.
Initially I thought the same - but at least you can still use a 10-45 Shimano Microspline or 10-44 SRAM XPLR cassette and still get quite a good range for gravel. It's less than I'd personally like, but for riders in less hilly areas I think it will be suitable.
I think the first issue will be waiting for the price to settle and for some stability testing to be done. As others have said, given the more remote territory I'm likely to be on on a gravel bike, it's a pass from me until others have tested for a significant amount of time.