Here's a little update after a few more tastings. I brought out my half-empty bottles of the Clynelish 14 and Springbank 10 today to compare them again, and things have certainly changed since the last time I tasted them.
The Springbank 10 had much more of a "bite" to it than I remembered, and was not really pleasant to drink. I'll have to revisit that one again in a month or so to see if things change.
However, the Clynelish 14 was a real surprise! A few months after opening, this "salty" whisky has really come into its own! Even the nose had some slightly salty notes. The palette was balanced sweet and a little salty, and the finish was MUCH improved since I had last opened the bottle (It originally had a strange aftertaste, which has totally dissipated after a few months open). I've read that the Clynelish is a whisky that requires a lot of patience to allow it to really open up, and I definitely agree.