Must say I don't think they got this one right as an upgrade. You're spending 3xp for one additional secret and a willpower pip. The seeker version is vastly superior since it allows you to search three cards at a time and do something to all of them. That's a card that has legitimate utility to a number of investigators. This ? Not so much. I honestly can't see why anybody would ever buy this card. It's only marginally better than the Lvl 0 version. If it was a Lvl 1 card then it might be worth adding to a deck. 1xp for an extra secret seems about right, a small investment for a small bonus. At 3xp it's just prohibitively expensive.

This would have been much better if it was a free action trigger. That way you'd have two different upgrade paths, both of which were valid. Seekers would get the greater range of cards they could influence, mystics would get the much more limited scope but without having to spend any actions to use it. As it is though, I'd be amazed if anybody ever uses this card in their decks.

The Scroll of Secrets is worse than the one, that's for sure. But Mystics probably haven't access to that, so let's make a few points on Scroll of Secrets in a pure after playing it. Yes, most things will work with the counterpart. I'll speak exclusively about the Tabooed versions (with the ability).

• If you go Down the Rabbit Hole (maybe you primary upgrade your spells just with Arcane Research) this costs you 2 XP, which feels like the right spot experience-wise.
• 4 Secrets for 1 Resource is very solid, especially if you want to spread secrets with Eldritch Sophist across the table. Only Encyclopedia (2), Schoffner's Catalogue and the upgraded Ancient Stones may offer the same ratio, while Forbidden Tome (0) and Forbidden Knowledge are slightly above.
• If you use all the secrets for draw (not discarding, not leaving them there and not for manipulating the encounter deck) overall you get 4 extra cards in windows (one more card than the Scroll, though you can't pick one of three).
• There is a bit more competition for hand slots these days, but in general Mystics have hand slots to spare, unlike Seekers.
• Gone empty, it's a great target for Dexter Drakes ability or for Sacrificing to get resources or even more cards. If you have access to level 1 cards obviously there is Library Docent, too, for repeating the fun.

As people mentioned, the most interesting difference to the Scroll is looking at the top card of your deck and being able to discard weaknesses you would have drawn next. With the one you can delay them (putting cards from the bottom on top), but probably you have no knowledge of weaknesses sleeping at the top of your deck.

The effect sounds like the old Alyssa Graham Trick protecting you from Doomed and stuff, but therefore you just put the card at the bottom of the deck (drawing it later) and have to add doom. Also if you're like me you could forget, that you shouldn't activate effects which reshuffles your deck...

That said, Mystics are the masters of “look at” and “return in any order”, so you have a chance to manipulate your deck in order to discard nasty weaknesses like Doomed, Offer You Cannot Refuse or Unbound Beast. In the past there wasn't much more than Scrying, but with the release of EotE we have Parallel Fates (2) to celebrate, which lets you look at 6 (!) cards. In mid-/lategame (or using Underworld Support for smaller deck size) there is a realistic chance to draw an important card with Parallel Fates (2) AND discard 1-2 weaknesses with the Scroll. And even without manipulating effects, I randomly hit a weakness or two with the Scroll and discarded them in my play-through (which may happen often in the Edge of the Earth campaign due to spoiler reasons).

The option to look at the bottom of the deck is neat too, if you've drawn Doomed and want to discard Accursed Fate or if you have Wendy's Amulet or a Copycat player at the table. Speaking of this, as with the other Scroll of Secrets it's a great multiplayer tool because you don't have to be at the same location in order to look at another investigators deck.

This card is actually really good in a Gloria deck. Alyssa Graham and scroll help Gloria mine the encounter deck further; it's also a good backup in case you haven't got your Alyssa out yet, and takes up a hand slot instead of arcane.

Bad combo piece. This card has only value over the level 0 version if you already know what's the top card of your deck or the encounter deck. It'd be amazing with Norman Withers if his text didn't force you to immediately draw every weakness you see on top of the deck. It might still be ok on him.

Otherwise you need effects like Scrying or Alyssa Graham to make this more valuable than the base version, except these cards already do good things on their own. This card does not justify itself over the base version.