Yes, I've heard that the programmers for SE have a lot of experience with console programming, as opposed to PC, and that this time they started with the PC first as opposed to XI where they did the ps2 first. And with what you said about the engine being designed for consoles, the two would make a bit of sense as for some of the issues.
Here's the link from where I saw it:
http://www.qj.net/qjnet/mmorpg/produ...ggest-bug.html
And yes, I'm quite aware other companies use engines already developed, its somewhat logical after all, to use one that you know works well.
I'm not blaming the engine by any means, I'm merely wondering if its hard to work with. An engine may be very efficient, but cryptic to work with after all.
As for your recent addition: core changes can rather upset the entirety of the code, so changing the battle system being lengthy is understandable. As for the menu however, adding a new portion to it, if properly coded, should not be a hassle. Actually it should be pretty easy as it should have functions to do that already.