Don't know if any of mine are soft and mush or not.
Some people have complained that they feel their pistol's safety is too easy to move from safe to fire, or fire to safe.
As you found out, there are stronger springs for them.
There's another source for stronger springs that many here recommend but I'll be darned if I can remember the name of the company. Members that have ordered from them say the got good service and the springs improved the feel/movement of their pistols safety.
Hopefully someone will chime in with their name soon.