What I learned from my Beta testing:
1) High Security Systems now live up to their names. If you don't feel cut out for combat, then stick to these types of systems. Interdictions seem to be less common, & security forces will turn up sooner-& in greater numbers.
2) Interdictions overall seem to be scaled down. More of the combat you encounter will be combat that you choose-like RES's, Nav Beacons, USS's & Interdicting others.
3) If you're flying alone, I strongly recommend you stay away from Threat level 4 USS's. Even level 3 USS's can be tough going for a lone pilot. Similarly, with distress calls, be ready to flee at a moment's notice

.
4) NPC encounters seem to be more scaled to your current combat rank. So, if you feel your current combat rank is no longer justified, then maybe ask support to lower you down 1 or 2 levels (I plan to start from scratch this weekend, so will entirely avoid this issue

).
So no, overall, I don't think the AI is too hard at all. It is about right (be thankful you're not up against the Beta 4 AI, that was borderline brutal

). You just have to fly & fight smart, & not expect combat to be a "fish in a barrel" experience anymore!