The single door is not beyond consideration. I would not say it's a big issue, but it is not none either. A fellow I knew was killed in a Bonanza, as he could not exit through the single door before it burned. He was the very experienced owner of that aircraft, so if he could not get out, a person new to the type would have more problem.
Some windows can be kicked out, but do not assume it will be easy. And, yes, broken acrylic plastic can be rather sharp.