Gotta say I got the opposite feeling when I DMed it a while back. It's a clumsy system that badly needs a 2nd edition where they fix all the papercuts. I remember it being particularly unnecessary how the difficulty number has to be multiplied by 3 before you can use it. Just have the scale be from 3 to 30 to begin with so I don't have to remember what numbers are pre- and post-multiplication.
That said, it is somewhat easier to DM than 5e (which itself is heavily simplified compared to older systems).