Sadly I don't see anything simple there. IMO interface is overcomplicated, like in most of PM applications. :)
I would suggest you to try it once.
Wasn't clear but what I meant was that you should go beyond the Gantt timeline model, and envision a way modern way for something that was designed in the early 1910s. You have a great base for that and can improve with few tweaks & mergers here and there. :)
We are already working on it to bring more changes and tweaks to make it more user-friendly. Hope you liked it.