I've now read through most of the material and I don't see any of it that brands Aetius as a raving anti-Epicurean, so I wouldn't think he would be tempted to misrepresent Epicurus generally (or at least, not more than seems commonly the case).
I don't think it is possible to know anything about Aetius' position on anything. It's not even certain if such person ever existed. Take a look here (I just skimmed through the text so I can't vouch for its quality nor factual reliability).
Did the doxographer Aëtius ever exist? [the original 1983 paper, now see the detailed 2016 refutation of Diels's Aëtius hypothesis and of Mansfeld and Runia's attempt to save it: "The origin and transmission of the doxographical
The original 1983 manuscript of the paper "Did the doxographer Aetius ever exist?" published in microfiche form in: Philosophie et Culture,…
www.academia.edu
Never mind the author of 'Placita', the work seems very interesting. Thanks, Bryan for mentioning it.