Is php 5.4 safe without Suhosin?

Question

I'm currently working on developing a PHP CMF which will eventually be commercially available and I want to use traits. The problem however is that traits are a PHP 5.4 feature and apparently the popular Suhosin security patch isn't compatible with PHP 5.4.

So my question is this: is it safe to run a PHP website without the Suhosin security patch? If not, what vulnerabilities would I be leaving myself and other people using my CMF open to?

Note: I'm not concerned about shared hosting. It's expected that anyone using my CMF would have administrative control over their web server.