I personally find the 70$ price tag rather high for a text editor. However, this is not my main issue
For this premium price I do not only expect features but as well documentation and if you are a plugin developer the current ST2 documentation is just plain bad because it misses too much. In addition, even though ST2 is highly configurable nowhere are all the options explained that you can use and manually set. I fins this rather annoying and think this was something to fix along the ST2 life cycle.
I'm not sure if the beta will conivince me in paying another 30$ for hope that this will some days come.