Every mod has it's own difficult points. People that have trouble with speed and reaction time have trouble playing DT, with accuracy, aim, and reaction time; HR, and with reading; HD.
I agree that DT rewards too much on easier songs (or farm-able songs), but it's definitely viable on harder songs that are actually hard to play with DT. It's a matter of individuality, because some people will struggle with DT more than others since it's not tuned towards their playstyle or skill level. Whereas others who are already used to the speed of DT can easily churn out higher pp scores with their mindset and experience with the mod.
I agree that DT rewards too much on easier songs (or farm-able songs), but it's definitely viable on harder songs that are actually hard to play with DT. It's a matter of individuality, because some people will struggle with DT more than others since it's not tuned towards their playstyle or skill level. Whereas others who are already used to the speed of DT can easily churn out higher pp scores with their mindset and experience with the mod.