BMW 4.6 is poor acceleration and hesitation

[Aman]

Over a week now since last engine light was last reset:
Still no check engine light coming back on
It actually feels as if each day the car is becoming faster and smoother and the exhaust gasses don't smell of much now.
Less and less pedal effort is required to make car move now
Hopefully it will become more economical too !
Can't believe I was putting up with them smelling so rich before oxygen sensors were changed, as several of you advised me to.

[Aman]

Hi does anyone know if these fuel trim values are normal (at idle)
The long term bank 1 stays at +3 to +8%, but long term bank 2 is -1.5 to +1.5%, and averages 0.
When I open the throttle fully, long term bank 1 goes (down) to approx 0.8%, but long term bank 2 (goes up) to approx 3%
The reason why I ask is because although car has improved since replacing catalytic converters (bank 2 was damaged), and after replacing both pre cat oxygen sensors the car definitely improved more.
But what I'm finding now is that the car is much more powerful than before, but sometimes it has loads of effortless acceleration and sometimes it needs to be pushed and acceleration doesn't feel as smooth or rapid.
What I have recently noticed is that sometimes car idles at approx 710rpm slightly rough, and sometimes it idles at 600rpm smoothly (i always check idle with all accessories off and car warmed up)
Any ideas what could be wrong?

[Aman]

After going on the motorway for 80 miles, most of the time on cruise control (this makes it go into closed loop, right?)

[Aman]

Oxygen sensor voltages to go with the fuel trims after the motorway journey:

[Aman]

Fuel trims after local town driving without too much acceleration:

[Aman]

Today I was in traffic moving slowly for 2 hours and this is what happened to the fuel trims.
Anyone have any idea what could be causing this? Thanks
(Pre cat sensors both new, new plugs, coils all fine, new maf, cats both new)