Unfortunately no, 3D development becomes complex due to the added dimension... but you CAN consider a hybrid 2.5D if you wish. It allows for 2D gameplay but gives a little more 'pop' to graphics, environment and anything else you need.
UDK is great, but I will agree that it takes getting used to and learning everything... but is a fantastic engine tool/editor.
Also, it is possible to continue using easy game making software to create 3D worlds (GameMaker for example). I have seen first person shooters made with GM by scaling sprites and such depending on distance. It is a lot of work though.
If you decide to continue using UDK though, I am pretty knowledgeable and can offer assistance if need be. The UDK community website is also stuffed full of information and resources such as how to script the camera to a 2D platform style.
Here is the info for the camera and other possible views achieved using UnrealScript:
UDN - Three - CameraTechnicalGuide