Two suggestions...

[joximu]

but it's not omega... :-) - ok, we stay here...

I think it would be great if there is a sort of comparison table where is ispCP omega compared to the other control panels, with some reasons, why some things are solved differently.
ispconfig is more a complete system (like plesk :-( - SysCP does store mailbox infos in the database (has pros and cons - when DB is down... :-) - and alot of other things.
On my journey to find a good cp I came also to "GNU Hosting Helper" - seems to be very modular (but ugly). There are a lot of other CP near the known. Eg baifox, ispman and some really small projects. The point is to keep the balance between reinventing everything and bringing all together to one big thing...

This comparison table also should help to build the new panel.