Take care about how you warm up your fingers. I'm pushing 60 and in order to play well I have to warm up. It actually takes a while every day to get to where I want to be. Plucking also has to do with your fretting technique as well, sometimes limbering up my fretting hand, makes it much easier to pluck smoothly and easily, I'm just synched up better. I guess what I'm saying is that perhaps high or low tension strings may not be the primary issue here.