No, I am not the great Iie, just take his name to remind us that Iie Sumirat is TH's first and greatest teacher in badminton, besides a great player himself in his time. He is the first who spotted TH talent when TH was still a kid.
On TH vs LD dynamic, I would devide their 6 or 7 head-to-heads into 2 periods. The first is when TH didn't feel any fears at all towards LD and when the scoring system was still 15, he was unbeatable by LD. The second period, was that when the 21 system becomes official last year and TH started to feel this fears towards LD (either due to new scoring, or due to the fact LD has found a way to beat him and becomes stronger mentally). So this new feeling only started in his last 2 or 3 matches against LD, not enough to unlearn it. That's what I meant with playing more against LD is necessary to get use to and unlearn this mental hurdle, that's why CO ll be good, if he can meet LD again. LD has completed his process of unlearning his fears from TH in the first period of their h2h. Now is TH's turn.