I was about to answer: No, I'm not aware of any plans to convert Kouvola-Utti airfield to military/civil airport. Meanwhile however I made a brief search and was able to find an interesting text dated 11/2009
(in Finnish) with the Kouvola City Council unanimous resolution to increase the level of operation at Utti and start the civil traffic as well. It's a long way to achieve it, but hopefully could be done...
Soon it will take just 95 minutes to travel by the express train from Kouvola to St. Petersburg with passport control taking place inside the ICE. Moreover, the travel time between Helsinki centre and Kouvola railway station has already been shortened to 1 hour 23 minutes. If the upgrade of Utti airfield proves successful that could become a viable option even for travellers visiting the capital city of Finland(!)