This issue never will experience people, developers or players, which are enough fluent in English. This is problem for people, who are not enough fluent in English and unable to focus on two things at once. Normally during complex combat stages ONLY vocally told important mission objectives, without realizing of which impossible to progress, in this way getting missed. As person unable to focus during combat on something more, eg. vocal told objectives in foreign for him language, eg. English.
Personally, I don't hear them during combat, similar like people listening music, but don't try to translate or understand song words. Like Halloween event mission, last phase at boss, something they telling about consoles. I just hear word "consoles", nothing else, as I'm focused on combat and don't realize anything else from all those words, as English is not my tongue language... Similar like people hearing tongue language much better than any foreign language, which they know and realize it at much more silent levels than other languages.
I seen many people, who didn't knew what to do at last boss phase on Halloween event mission, and I don't think that they were poor players, but many people who play STO and other online games not always are enough fluent in English and probably even some people, which tongue language is English as well have double focus issues, maybe with AHDH syndromes and similar.
I don't ask to fix anything in already existing content, but to consider this while you developing game content and not only for this game. This issue is rare, but I experienced it not only on this game (Eg. AvP mid-boss fight scene with fuel canisters, while how to progress in that phase told only vocally in English, while player is busy with endless horde of aliens, which attacking him at that moment).
P.S. Exist some solution, to switch to more fluent language, for instance I better know Russian than English, which is 2nd language for me, while English just 3rd and not last, which I know, but I wish to learn English better. That's why I using all software only in English, especially games.
Yep, I seen all Star Trek TV shows, more than 10 times in Russian language, as scientific terms for me easier to realize in it, but STO greatly helped me to improve my English language skills and I very thankful for it for this game. One of reasons, why I still play it. My Kirk, Sisko, Janeway, Seven Of Nine or others had different voices and were fluent in Russian
Especially Seven had very good narrator, which added to her personality a lot of strength and desire.
Regards and Peace!