No it does not mean it's best. But i found that if i take photos with nearly stock settings (awb changed and sabre merge on) the latest is little better. Don't know why but it is little better.Yes.
But it means not that the latest revision is the best....
I've shared the 8.2 final and it looks much different to 8.4 beta...
And no updates anymore are also not equal to the best possible picture...
But I don't know all and I don't know at this time what's possible with the final...
Overall.. I'm happy on my phone (Moto G7 Power) with LMC 8.4 R9 and sometimes also using Parrot043 latest mod.
Next main thing is to wait Google Camera version 9