I'm not sure I understand the argument for why it matters if the characters were converted from 1e or not. The 2e rules also support getting to high Valour/Wisdom, and the 2e rules also seem to assume/encourage a greater a likelihood of getting famous weapons, so certainly you will eventually get to the same point of auto-triggering revelations just by leaving home. Or waking up in the morning. (But if I'm missing something subtle...or even something not subtle...I'd love to have it explained.)
I'm not sure that in itself is a huge problem. It's not like revelations happen instantly, so the only real impact is that, well, everything is just more difficult than it otherwise would be. Which in some ways is good, because you want to keep the challenge up.
But, at the same time, if you are always above the threshold there's zero incentive to try to avoid adding to your Hunt score, and so the tension disappears. Plus it just feels wonky. And the same problem existed in 1e.
However, it's a hard problem to solve. I spent a bunch of time back then (I think Jacob and I fiddled with this together) trying to come up with some alternate rules that would work at both low level and high level, across all fellowship sizes, and we never came up with anything I would call "flawless". Especially with the constraint of keeping it in the spirit of TOR.
It’s just the complex interaction of all the various caps on character power. Shadow - and Scars, which require Advancement points to heal, thereby limiting Valor, Wisdom, and Combat Proficiency. Bouts of Madness. Revelation events. The danger of wielding famous weapons openly. The dangers of Magical Successes. The difficulties and challenges that the GM presents. And the story and narrative.
All of these are different in 2E.
Any PC’s story will end in death, Madness, or retirement, and I strongly suspect that if the OP’s party had started in 2E many of the characters would have ended in one of those ways already. And an entirely new dynamic, of choosing whether to take a Famous Weapon on an adventure, of avoiding magic, of hiding their power just as Gandalf and Aragorn did in the books, would have evolved as Eye default rating grew troublesome.
That’s why I think simple use of 1E characters in 2E becomes more problematic the longer they have been played. And the OP’s characters have been played for a long time.
I think assuming you can use an earlier character sheet in a new edition is not really precedented. Those characters need to be adapted/converted, but it’s very hard to do. Should they have some scars? How far down their shadow path should they be? There’s a lot more to think about than simple skill points and Endurance.