I've found the Maps subscription to be incredibly helpful
Depends on what you're after. If this is solely to reach the fourth subscription for Paizo Advantage, the Adventures line is probably the cheapest option. (Uh, not that I'm recommending that approach...) If you're asking about actual value, eh, depends. Going for Pawns would maximize the benefit of your Adventure Path sub, since most APs get an associated pawn set. Adventures gives you a nice middle ground option between the one-shots of scenarios and the months-to-years campaigns of APs.
Personally, I only just started subscribing with the 2e launch. I've already got a group I'm having a blast running Fall of Plaguestone with, so I'm definitely getting good value there. My pawns have mostly been collecting dust, though that's just because the last two sets have had little to no overlap with this adventure. I expect that to change when the Bestiary Box launches.
As for Maps, I considered it, but the frequency (and price) of the releases coupled with how situational many of them seemed to be made me pass. I opted for Accessories to get all the launch essentials (GM screen, character sheets, etc.), but looking ahead that's looking like it's gonna be more hit (Bestiary battle cards) or miss (chase deck). Hope that helps.
Oh, and if you're interested in Starfinder you could always try one of those subs, but since you're posting here I'm guessing that's not your top option.
If you value the Pathfinder maps, you might want to consider the Starfinder Maps subscription as well. While many of these maps are too futuristic to be of any use, maps such as the "Ice Planet" could well be useful in any setting with appropriate local weather conditions.