Accuracy has two problems.

1. Nobody likes to miss.
2. It doesn't get any better after hitting cap.

Nobody likes to miss, so they try to find the accuracy cap. It's annoying to guess at where it is. And even when you do find it, it doesn't help if you have any points over the cap.

Just set it like this. Just for example, say 500 Accuracy is baseline. With 500, you could hit anything. Under the effect of a Blind debuff, your accuracy goes down and you might miss. But what if it's higher than 500? Well, that's your crit. The more accurate you are, the more likely you are to crit and the harder you crit.