Yes, the Omnifocus desktop app is quite ugly and messy looking. I’ve barely touched it since doing the initial setup. I use the iPhone and iPad apps for everything; they aren’t as pretty as 2Do, but not really ugly either (I think) and I like the purple icon.
On 2Do’s forums at the time the devs were very firm that they saw tasks as completely separate from calendar appointments, so I agree that it’s unlikely they will create a forecast or other calendar view. But as you say, 2Do has a lot of other useful features. Perhaps if they have a sale on the desktop app I’ll cave in and check it out.