Open a thread, it is puzzling that one doesn't exist but we create our reality in this community.
On your original topic, I think Ionescu doesnt have anything unique about his forehand per se and IMHO neither did Kreanga. Kreanga because of his athleticism and relatively small size managed to throw himself around and recover quickly, but in principle, technique is about bringing your athleticism to bear on the ball, not so much about fitting some textbook stroke, though there are things that can make it harder to hit the ball, there are lots of ways to swing with quality at the ball. I was reminded of this yesterday when I saw a video with a high level player coaching a good player to change his forehand and it was interesting to see what changes were being encouraged. I wasn't 100% convinced that the forehand was massively improved if it was improved but I am nothing compared to that coach and everyone hits the ball differently, we just sometimes pretend that differences in athleticism and game reading skills are ultimately technical because that is what we can see.