So Not all is bad with new engine.
First some disclosure my computer is very low end in 2012 it costed 300€ to make, as such I estimate today its worth around 100€ nice round low end number anyone can buy today used today.
Intel i3, dual core 3.3GHZ
8GB of Ram,
Windows 7 aspirated
AMD Radeon HD 6450 graphics card (naturally cooled no supercharging here not even a fan)
SSD drive 120GB for system and now AO new engine build, 1TB regular drive for backup
So as you see nothing fancy
I run AO windowed 1280x600, Multiboxing sometimes.
FPS I get with new engine? mostly around 10-30, in rare cases counter says 70fps but I don't believe it.
Settings I run? Mostly lowered, for max FPS, like I run old engine too, like 40m view ranges on high effects etc. All effects on.
Here are my positive encounters... Major improvements to FPS in several situations... namley DB2, tower wars, Borealis, Mittar. Especialy whenever there are masses of effects new engine is very playable while old one was lagging as hell randomly dropping to 5fps and such.
Interestingly today at tower wars with all the effects bombardment new engine was way more playable than old engine ever was in such a scenario.
In short new engine I prefer in all ways but one. Multiboxing buffing chars is quite a resource hog. So for that I think i'll stick to old engine for now. It is quite doable on new engine aswell, but with 5-6 logs everything becomes lagsome, when before i could just keep 5-6 buffing chars online and play my main one.
Its also prettier.