Makuu here are some benchmark results for you.
Comparing E01 Lite, A11 Lite, and A11 Pro against your 6.1 A09 Gold1.
All benchmarked using SKTools on 64MB X51v.
Higher numbers are better except for SKTools loading time which you want lower.
The TCPMP test is testing video playback, higher the better.
1. Straight Test means 'straight after ROM flash'
2. After Setup means 'after making OS how I like' (did include disabling titanium and honeycomb)
3. Auto means 'CPU set to Auto'
4. Max means 'CPU set to Max'
As you can see;
Extendir does increase 'file listing' but look at the slower 'device memory read' and 6.5.x Lite can't match the 6.1 quick loading time.
In real world testing;
E01 Lite = Slow Acceleration, Average Screen Tap Response, Average hand writing in Notes, Some Jitter in Games, Screen coruption on wakeup, No taskbar Clock, QuickMenu feels Slow, Average CFCard to Device copy.
A11 Lite = Good Acceleration, Good Screen Tap Response, Good hand writing in Notes, Some Jitter in Games, QuickMenu feels Good, No taskbar Clock, Average CFCard to Device copy.
A11 Pro = QuickMenu feels Slow, Good Screen Tap Response, didn't test any further as began testing the Lite ROMs but may do these tests in future.
A09 Gold1 = Slow Acceleration, Good Screen Tap Response, Good hand writing in Notes, Good in Games, Sometimes Screen Tap would register as a double tap and also would lose 'grip' while scrolling.
I like the free RAM after the Lite ROM flash. I think extendir is either waste of time for 64MB X51v or is not set to right MB to gain performance. You are on the right track with WM6.5.x ROMs and A11 Lite was a major step forward. Maybe tweaking the pagepool might get the performance a bit higher, with titanium and honeycomb disabled I had 31MB to 32MB free. Although untested, if pagepool was set to 5MB then probably 29MB free, but possibly better performance? (Just speculating).
Can't wait to try your next ROM!!!