It's very, very late for that. Reworking all quests, from ARR to EW is just so unrealistic, all we can hope is that 7.0 forward will be more engaging. For now, taking out the garbage from the most problematic part of the game, the ARR, is the most effective and realistic solution, even if it means scrapping some lore. After all, there is no point of the story if player quits before it finishes.
I don't know why would you ask for pointless examples, you should ask for statistics if you want to prove something, but here you go, first few google results.
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https://www.reddit.com/r/ffxiv/comme...ing_ffxiv_and/
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https://steamcommunity.com/app/39210...3332723117754/
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https://www.reddit.com/r/ffxiv/comme..._hw_is_so_bad/
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https://gamefaqs.gamespot.com/boards...eborn/78930684 This one has poll with 62% going "They could trim it down more."
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https://steamcommunity.com/app/39210...1204140137950/
- Me back in ~2014
As for some statistics, FFXIVcensus has some data which are related to when the players quit. You join GC at MSQ level 20, yet ~69% (nice) of player characters don't even have any GC:
https://ffxivcensus.com/#grandcompany
Obviously this has more of an indicative value, since it counts characters, not players, and it doesn't take into account players quitting in level range of 21-50 and so on. But considering you asked for random examples instead of actual data, I doubt you mind that.