Just came from Honda Breeze dealership. Shocks and all suspension parts are fine. However, rubber bushes are bit hard due to cold winter but that doesn't need any immediate replacement.
Now the problem for stiff ride is Hard Tyres. Tyres are now almost 3.5 years old and become hard. Other than that nothing is wrong. Reason for hissing sound in morning is coldness, that's why car become silent when hot or parked in sunlight.
BTW: I'm currently using Yokohama DB Advan 195/65/R15 with 28psi Air Pressure
Hope this helps! 