Nevertheless, the addition of a few rifle-armed men to a company of voltigeurs (or to every company of a light regiment) would have been a good idea in my opinion. You don't lose the firepower and speed of a musket, but you still have your best shots taking out targets from longer reach.
Ah, and that is what the Russians did. In each company of Jaegers all NCO's and the 12 best shots would be armed with rifles.
But the Russians are not very famous for their skirmishers since they just remade line regiments into Jaeger regiments so the result would still be that they were robots just like the line. They did nothing without their officers telling them to do so, something that is very bad in skirmishing, but some of them were good shots, but in general the Russian army were not good shots because they had very little practice. Some of them fired less than 6 shots, and those practice shots would often be made of clay, that was the economic situation of Russia.
Even worse was that those who had been in a battle before were not allowed to have practice shots. In comparison the French always had shooting practice in peace time with targets and then several shooting competitions. In war time they had moving targets to practice on. Additionally, the superiority of the French skirmisher came in intelligence and independence. They often took initiative by themselves and could analyse situations and what to do.
In conclusion, yes, rifles would be a great addition to a voltiguer company if they did it in the Russian pattern ( NCO's + 12 best shots ).