Simplicity is deceivingly challenging, and quite different from simple-mindedness, which seems to be what the author is accusing Go of being.
Keeping code simple, elegant, and consistent is IMHO one of the most valuable principles a team can adhere to. Simple is not necessarily shorter, as short can often be subtle and sneaky rather than simple. Complex power tools can be fun to the inquiring mind, but the ultimate consumers of your product almost never appreciate how you built it, but almost always appreciate the final outcome.
A wise man once said: “Everyone knows that debugging is twice as hard as writing a program in the first place. So if you're as clever as you can be when you write it, how will you ever debug it?” - Brian Kernighan
Highly readable code helps reduce bugs. But if that code is also so simplistic that it necessitates a lot of verbosity, you definitely increase the chance of introducing some stupid bug. Thankfully, as a compiled language, Go can find a decent portion of the silly stupid bugs where in a more expressive language like Python they might go hidden for longer, but it's still a big tradeoff you're making.
You would need to know the nature of the tasks to pick out those that need longer answers but all the Go tasks are here: http://rosettacode.org/wiki/Category:Go - most of which should have Python solutions.
we decided to transliterate our 90k lines of Python directly to Go, line by line
The 90K number includes our tests, but without tests, the Python codebase is 36,784 lines of code. Those same lines of code became 41,717 lines of Go code. So, not that much of an increase. When you consider that's just 4,933 more lines, it's not crazy to assume most of those are closing braces.
I'd say closing braces and trivial expansions of list comprehensions into 3-5 line loops.