Really the contact leaf is the most likely to be worn rather than the stem. It is a quite thin and delicate piece of metal in comparison to the stems. I have gotten some rather beaten up POS board with clears for example that were so worn they felt linear, take out the stems and put them in a new board and they felt like new clears.
Unless you are sourcing some springs from somewhere like some crazy 45g Korean springs or something, you aren't getting lighter springs than blues from any stock Cherry MX of any other type.
Personally I would just say spend some more time getting to know your reds. I use Poker with reds as my everyday board and I almost never bottom, but have no problems with missed keystrokes. Of course I am no light speed typist either, I only go at around 85wpm or so.