Compared to Visual Studio + ReSharper, Visual Studio for Mac is quite a step back (putting it mildly). I've high hopes for Rider (cross-platform JetBrains IDE for .NET that was just released), though I haven't tried it yet.
That said, third party IDEs can always be expected to be slightly behind the first party stuff. But in this case I think it's worth it and might actually be a good litmus test for adopting the next releases.