yah, spring, damper, sways are pretty easy to maintain once it's all set up. ive had endlinks fail and some springs sag (TEIN) in the past but swifts are higher-end than TEIN and linear rate so shouldn't be a problem.
i read one post in the suspension section about a leaking koni yellow. might want to follow that to see how the situation is resolved with the warranty replacement etc.
yellows are notorious for having bad lots from time to time. must be a european thing.