I have significant familiarity with Aquinas, and I do not see anything worth reading Aquinas for, save perhaps arguing with theists. Insofar as there are interesting ideas in his writing, they are better presented elsewhere (particularly in modern work with the benefit of greatly improved knowledge and methods), with greater clarity and without so much nonsense mixed in. Recommending that people read Aquinas, or castigating them for not having read Aquinas, seems like a recipe for wasting their time.