Really good IDE support would include refactoring (more than renaming a local variable/struct field, e.g. Extract Function, extract parameter), advanced navigation/analysis (analyze data flow to/from variable, find call stack etc).
Go is somewhat decent in the tooling area, and you can get your job done with it, but it really doesn't have anything I would call good support in any area of tooling except the compiler (not code analysis, not debugging, not monitoring, not profiling, not package management).
I suppose it depends on what you're used to. I've never found myself wanting to do these things, but I'm also strictly from a Python and C++ background so my standards are admittedly lower than Java and C# people. Hopefully gopls solves for these problems.