I think Martin has done a great job with Cheetah. I'm not sure if he still feels the same as he did some years back, but back then he was determined to keep Cheetah affordable and easy to use. One reason why Cheetah is reasonably priced is because it's mostly a one man show. And that's also the reason why Martin can't implement everything. If you want a team of ten developers, with all the up to date bells and whistles, then you will pay for it (except for "Blunder", but that's a different case.)
At the end of the day, software is a tool. You use the software that does what you need, and avoid the ones that don't.
Cheetah occupies a fairly unique place in today's 3D world, certainly on the Mac side.