What are the bones of a Powerful CMS

Question

I'm working in a company to improve their own market CMS, if you had the opportunity to build your own CMS (revision of existing CMS) what steps would you take?

As far as I know these things can be most important:

• template engine (caching ability)
• a php framework (ZEND)
• a javascript Framework (Jquery)
• OOP coding style
• Security Issues (I have no idea how to make this happen, trying to obey security notes in writing php is enough or we should use any existing security)
• an auto updater script (wondering how I can do it)

Answer 1

See how the POWER of frameworks is calculated and compared. Thanks

Core points include:

PHP4
PHP5
MVC
Multiple DB's
ORM
DB Objects
Templates
Caching
Validation
Ajax
Auth Module
Modules
EDP Routing