Architect-level is complaining about language quirks? That's low on my priorities for languages. I'd worry more about maturity, tooling support, library support, ease of learning, and availability of developers.
I think our end-state decision, IIRC, was to just expand our usage of TypeScript; which also has Golang beat on all those verticals you list. More mature, way better tooling, way more libraries, easier to hire for, etc.
Though, thinking back, someone should have brought up TypeScript's at least three different ways to represent nil (undefined, null, NaN, a few others). Its at least a little better in TS, because unlike in Go the type-checker doesn't actively lie to you about how many different states of undefined you might be dealing with.
