Hi @EarlGrey999 and welcome to the forum!
While camera quality is a tough topic to discuss (as many aspects remain subjective and difficult to assess in a scientific way), I can tell you that FP5 camera quality and reactivity have been worked on constantly since the launch of the device.
We have provided several camera improvements with the first software update after the product launch (back in September) and other camera improvements (auto-focus in portrait mode, fix for malfunction of the just saved picture when SD card is the main storage, etc.) will be delivered with the next software update.
And more camera issues are under investigation and/or in progress.
I cannot guarantee this will dramatically improve the DXOMARK score, but it certainly addresses some specific issues or performance problems that were reported to us by users or the press.
In regards to FP4, as already confirmed before, a broader camera quality improvement is a work in progress and we aim to deliver it somewhere in the first half of next year (I am sorry I cannot be more precise at the moment) 