In my opinion, if they were aware, they would not have just given out the Stonehenge building which again adds to the T3 problem in a bigway for chapters 5-8.The developers are aware @m4rt1n. Noticeably since the chaos started and everyone started complaining of the T3 overload, abruptly all new set buildings disappeared from the events.
Now that they have stemmed the problem from getting worse, I think, they are considering how to solve the existing problem. It isn't an easy one. The most obvious answer is that they will nerf everyone's sets where large amounts of T3 is being produced (see the Crystal Lighthouse problem or the great culture/pop nerf of 2018), but if they do this they know the horrific backlash they will get from everyone complaining about being lied to.
I'm not saying I'm in their corner, but now that they have made their bed it's probably a tricky one to sort out. Perhaps they need to provide tons of buildings that give free T1, as some have suggested, but then you will end up in a situation where everyone is just making way too many goods, plus newer players will become awash with T1, but not have the T3.
I don't see a more likely answer than all the existing sets being nerfed, but that isn't what people will want to hear.