Incorporate naturally-relaxed fingers into your vibrato motion, while adding more dimension to your sound.
Develop Effortless Technique (and Let Go of Tension)
We all know that great violin playing looks effortless. And in one sense, it is ... at least in that moment. (Putting aside all the work that led to that moment.) Great violinists have eliminated muscle tension and unnecessary work from their technique, either naturally or through careful practice, so all of their effort while playing goes directly into things that pay off in sound or virtuosity. And when your work is refined to just the absolute essentials, it really does become almost effortless. It’s a state we can all work towards.