It would be helpful to be able to filter "VA Find References" results by l-value to be able to find where a given symbol is being modified while removing the noise of the reads. Presumably filter by r-value could be helpful in some situations as well.
I'll admit I haven't though through if taking a non-const address/reference of a symbol should fall into l-value as well since it's something I'd want to be aware of in these searches.