Broken and system mastery are 2 different things. My query was more of how intuitive the system was to a player who wanted to just spend a minimum amount of time to build a PC to play? Will a hastily built PC still be viable, or will it stink to high heavens? Will I be required to invest a lot of time and effort in understanding what abilities synergize well with others before a viable PC can be constructed? Will I find myself sifting through hundreds of feats/abilities, with the grim knowledge that only a small proportion of them are actually useful, and I have my work cut out for me in terms of determining what those are? What is the disparity in power level?
I had a nice answer posted here ... and ENWorld told me I wasn't logged in anymore. So, I'm going to try this again. Sorry. Short answer: No, a hastily built character should be more effective in Complete Control than a hastily build character would be in a regular game.
There are several reasons for this. First, Complete Control doesn't have penalties for multiclassing. You can buy the BAB, Saves, Manifester/Caster levels that you want. This can be done quickly, too! And let's face it - in fighters and magic/psionics users that is where the power/effectiveness lies. So in Complete Control - you should be able to build effective fighters and magic/psionics users more quickly than in a regular game. {Of course, agonizing over spell/powr lists will be the same in CC and in a standard game}
The second reason that I think effective characters can be built quicker is all those hours spent trying to find the right combination of classe to get into the PrC you want. In CC that time is essentially gone. There are no class skills ... so if you want a skill to fulfill a prerequisite you can buy it. Also, you don't need to know all the classes that offer a certain combination of abilities. If you need an ability for a PrC requirement you want, you buy it. It's that simple. It doesn't matter how the various classes combine to meet the prereqs. You simply buy the ability and meet the prereqs. {Of course, the prereqs I'm talking about is if the DM transfers some/all of a PrCs prereqs onto the abilities contained within it ... which is recommended in CC for balance reasons.}
For these reasons, you should be able to put together an effective character in less time than a standard game. The ONLY thing that will take longer is adding up the XP totals spent. But if you can use a calculator (or better yet a spreadsheet that auto-tabulates) this can be done quickly and error-free. As an example, I can throw a legitimate character together in 15 to 30 minutes because I use Excel. Without Excel, it may take a bit longer, depending on how sure I am on my math tabulation.