Wow, that's way too much time man. If the lack of bass was the main problem with the SSR I think they really fixed it on the SSP.Lucky you! I'm still waiting for mine since 11.11... Unfortunately, I ordered from Moondrop official store and that was my mistake. I should use some other seller.
I hope they are worth waiting...
Listening to mine right now and I think that they are really worth it.
Also ordered the Blon's BL01 and will be able to compare both soon.