The Roaccutane? Hmm, I wouldn't know for mild acne as mine was bad. I was on it for a period of 16 weeks.
As for the blotchy skin, well at first it doesn't get rid of that, and you do still have red patches on your skin, which I was really worred about at first. But it does eventually go. This stuff really is amazing, it makes your skin so clear.
If anti-biotics didn't work, then I do suggest you go on this, especially as they've offered it 3 times. Remember, your skin is one of your most important and biggest organ... you don't want it to be unhealthy
Though, obviously I can't force you into it - only do it if you want to
If you do decide to take it, be sure to read all the side effects carefully. You'll need to have some blood tests taken, and this medication can give some people depression - though its rare.
Good luck with what you decide