Aside from the wheels, I have a lot of respect for the kit-frame. It is strong, relatively light, and easy to build.
The downside is quite simple. Everyone uses it.
If you want to get an advantage over other kitbots you are going to have to modify it.
This is what my team did last year and it was a huge mistake. We tried to use 25 chain, smaller wheels, custom transmissions, and a modified front-end for collecting balls. Mounting these parts on a frame that was not designed for them proved to be a disaster. In order to climb the ramp we had to implement a diabolical series of chain tensioners, as a result our chains repeatedly came off. The modifications also weakened the structure and it slowly bent over time.
As the name implies, the kit-bot is a kit and I would recommend following the instructions
If you want to do something different, don't try and transform the kit-frame into something it isn't.