How is it "deceptive" exactly? It uses the same language service (roslyn and typescript etc.) with Visual Studio; it has VS signature features like "peek", "fin

How is it "deceptive" exactly? It uses the same language service (roslyn and typescript etc.) with Visual Studio; it has VS signature features like "peek", "find references" etc. Maybe the debugger is not powerful enough now, but it is just a preview version anyways.