Nuances in Vowel Duration and Pitch

I've been analyzing how beginners often collapse long vowels in words like 超過, losing the essential rhythmic weight. There's also a subtle pitch shift in compounds like 届け出 compared to simpler verbs. For instance, 先日 requires a crispness that learners often overlook. Do you find that focusing on the 'mora' count helps maintain clarity, or is it more about the melodic flow of the sentence?