It's not all that innovative, it's just very easy to use, and very well put together.
IMHO If go were invented by anybody other than Google it wouldn't have enjoyed anywhere near the success that it did.
I'm usually extra suspicious of "hot" open source technologies with a marketing budget and/or tech behemoth behind them. It's not that they can't be fundamental steps ahead it's that the marketing can end up causing undeserved popularity.
I think it's not just Google, but the cult of Rob Pike, Ken Thompson, etc. I appreciate their work on so many things, so I don't mean any ill-will. I was a user of ACME editor and Plan9, but just like those projects, Go has so many polish issues in critical areas. The package management alone is ridiculous. The common theme in all these projects is for every good idea, there is an order of magnitude more critical mistakes or divisive ideas that cripple the end result in some way.
Go is alright, but it's not really that interesting to me or a monumental leap. There are a few ideas that others could cherry-pick and put into much better designed languages to take it all a step further in my opinion.
And the point of Go is that it isn't trying to be "fundamental steps ahead". If anything, Go is an opinionated statement that programming was better in 1992 than it is today, so let's just fix the annoying shit from 1992 and pretend the word "enterprise" had continued to just mean the ship from Star Trek.
I'm a 50+ developer who has increasingly felt that "life is too short" to spend all my time trying to keep on the latest fads.
That being said, I have found myself doing more "fun" programming in Go lately, precisely because, as you said, they hit the mark with how simple and clean the language is, with little of the baggage that comes along with a lot of languages and frameworks (I'm looking at you Rails and React) today.
clean syntax standard libraries write once, run anyone