You are still talking about Pro E. That is more than 5 years ago. Creo Parametric is a full parametric software. It is a sophisticated technology in this aspect that is very useful for developing products beyond basic parts, allowing companies to produce complex machine and large assembly products. Pretty much all CAD software can do the basic stuff. The parametric software may need you to specific more requirements for using each of the tools but this ensures reliability and better performance.
The software can be easily used once you understand how to use it. If you pay for support and done the training. You can get going. The support by the resellers are very good. All you need to do is contact them and they will show you exactly what you need. There is a certain way to do technical things, but this is important for technical sophisticated jobs.