Failing 90 min Threshold workouts

[ArHu74]

I posted the below topic, imho the jumps are too large between these types of workouts

Pavillon to Heng Shan is a big jump no in between workout alternatives

From Pavillon ( threshold 4.0 ) to Heng Shan (threshold 4.5) is quite a big jump with no alternatives in between. Between some levels of these types of threshold workouts there are small increments but between others there are only 0.5 jumps available (available workouts have levels 3.0, 3.5, 4.0, 4.5 4.7, 5.0 and 5.2)