Neutral cards are few and far between, especially long lasting assets, so here's one Accessory option that boosts and regardless of class.
The card is very powerful in theory. For 2 resources a +1 to 2 skills is great (camera great, so you get your money's worth even if you just ignore the empowered bonus. And sitting somewhere connected to 2 locations actually seems like it should be easy.
Often enough locations aren't actually in play for the majority of a map, other locations being connected to them doesn't fill the bonus requirements. This makes Hemispheric Map rather terrible when locations are being hidden behind Agenda or Act advancements, which they routinely are. Furthermore many high density clue locations are bottlenecks, for example Attic and Cellar, Hemispheric Map is just blank at these places, they are far from rare! If you take this in The Night of the Zealot, the card is inoperable in The Gathering, it's active throughout nearly every location in The Midnight Masks, and again it's just Off in The Devourer Below.
So you pay 2 resources, 3 XP and an Accessory slot for an item that's largely offline.
If I start talking about the other campaigns, it's again a rather specific set of goods and bads:
- It's no good in Dunwich until the 5th scenario (even then it's not helpful in the most important part!), it's flaky in the 7th and 8th scenario, so a mixed bag.
- It's nearly useless in Carcosa until the 5th scenario, from which point on it's actually great, terrific even.
- In the Forgotten Age it's all over the place, in exploration scenarios it's just off, the other scenarios tend to be multi-connected up the wazoo.
- Verdict is still out for Circle.
TL:DR, steer clear unless you're familiar with the map and know about a few high intensity spots where it will be good, frankly speaking the only campaign I can guarantee that it's good in is Carcosa scenario 5+, where locations are routinely connected to 2 others or more.