EU jobs (AD6 reserve list) - is asking for feedback worth it or pointless?

I am on an AD6 specialist reserve list. I apply to relevant vacancies within my field of specialization. Over the past 4-5 months, I have applied to around eight competitions. Each time, I reasonably tailor my motivation letter and CV. I do not have direct experience working in EU institutions; I work in the academia and have more than 20 years of experience. For about 50% of the applications, I have received a standard rejection, while for the others I have not received any response.

What I would like to know is whether, in your experience, it makes sense to ask for additional feedback (this option is always mentioned in the standard response). Could such feedback be useful for future applications, or is it completely pointless?