I'm not an Edwards expert by any means, but Edwards is an intriguing figure in that he attempts to articulate Reformed metaphysics in the (then) new era of philosophy we call the modern period.
On the one hand, like many modern philosophers, Edwards seems to simplify concepts such as causation when compared to the prevalent Aristotelian metaphysics of the scholastic era. For example, the WCF speaks of primary and secondary causation regarding God's sovereignty and free will in which God is the necessary grounding for all creaturely activity. This sort of (Thomist) language is largely abandoned by Edwards as far as I'm aware.
On the other hand, I get a bit grumpy when reading or listening to some historical or systematic theologians who frame Edwards as their latest pantomime villain because he doesn't use the exact same language as his predecessors. We can't just pretend there hasn't been major philosophical developments and talk as if we're living in the scholastic era. Nobody is going to take that seriously. Old ideas have to be defended using contemporary methods (which is what good analytic theology is attempting to do).