@lalitk The time now is to forget 'what was' and enjoy the 'what is'.
The obvious audible intrusion has been tamed, it will be a period of time, before the wish to bring to forefront a sonic that is detected as being not the most attractive is desirable to be tidied up. You are with quite a few trials of different permutations for support to be utilised, before Propping Flooring is the treatment.
In case I forget. the Diament Guidance, suggests the Roller Bearing will work on improvements to isolation in the Horizontal Axes, there is still Guidance on how to treat the Vertical Axes to have an improved Isolation. There are many who have done this and have found it to be of value. A said, there is also those who are strongly suggested to have built their Business offering the method.