This card joins the ranks of a growing list of events that grab 1-2 clues. I think Read the Signs is not the best of these, but also not the worst. In general, events like this get one clue for 2 resources and a card (Working a Hunch or 2 clues for 2 resources, a card and an action (Scene of the Crime, for example). Some cost less but have limitations (Eavesdrop) or drawbacks (Drawn to the Flame). Most require skill checks but a few are test-less (Working a Hunch and Scene of the Crime.
Good things about Read the Signs include lack of limitations, special requirements or punishments, and a bonus that is better than all the other similar events that require skill checks. The ability to ignore a location effect is probably pretty limited (only works on keywords effects triggered during the investigation), but of note “ignore” triggers Diana Stanley’s power. However, overall Read the Signs is probably second only to Working a Hunch in terms of flexibility, and so is less likely to be a dead card sitting in your hand compared to many of the other similar events.
The main consideration when deciding whether to include a card like Read the Signs is that its effect should provide a major advantage over a regular investigate action. So it is less valuable with strong investigators like Daisy Walker and Norman Withers. Diana Stanley is a special case because it could activate her power. Sefina Rousseau loves it, as pointed out by others, since she needs events and since she would rather avoid possible enemies coming from Drawn to the Flame, so I think Read the Signs either joins DtoF or replaces it for Sefina. Many other mystics would at least consider this card, since they tend to have 3 or less intellect.