If I may offer a couple of viewpoints..... In 30+ years of working with computers and users.. I have found two things to be true:
First, almost NO task is ever done with a single tool. The people that are doing really good work here at Shapeways often start a design in one tool, and then move it to another for finishing.
Second, I can take any two tools, and any two users. GIve tool One to user A, and tool Two to user B. Let them both work with their tool for six months to a year and develop a level of proficiency with the tools. Then, present both users with the other tool. GIve tool One to user B and tool Two to user A.
No change in the tools, just switch the users.
They will both proclaim loudly.. "Why didn't you show me this before?!?"
There are hundreds of different design tools, each with it's own quirks and benefits. You need to sample some of them, and find one that "Works the way YOU think" and don't be afraid of changing tools later on, if you find something that suits you better.
Short of that, I'd suggest that you find one of the tools that is actively being developed, and join their support forum to provide positive input to help them develop the tool to make it better.