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.

I've been using Rider and it's been pretty good. This shouldn't be a surprise. Remember that JetBrains started with ReSharper. This is basically their home turf.

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.