TDL is about individual HY share portfolios so no plans to include ITs though I have nothing against them. Readers can add them or any indeed any share to their HYP but that is entirely their own decision in which I can play no part. As you may know I am prohibited from giving personal financial advice so will not say much more on this.
What I can say in general is that I see little point in adding an IT which duplicates a lot of the shares held individually in an HYP because this would not improve diversification much. As a generality readers wishing to add an income IT to their HYPs should consider those based on different shares entirely, which would then satisfy one of the crucial requirements of HYP construction – diversification.