In fact my experience has been that overuse of channels is a code smell that alot of new go developers fall into and later regret. There's a reason the log package uses a mutex for synchronization.
In general I think channels are great for connecting a few large chunks of your program together. Concurrency is great but also not every function call benefits from being turned into a distributed system.
I think that it would be a great idea to develop more concurrent go data structures with generics and I suspect inertia is what's keeping the community from doing it.
My credentials such as the are: been writing go since 1.0. worked at Google and taught go classes as well as owned some of the original go services (the downloads server aka payload server).