Now I'll admit I've played or experimented much with Rogues and have recently just started playing a deck with them, and here's my critical take on their class in general. (I spend hours tweaking on what I think is the maximum potential of an investigator).
1) Their best attribute is Agility, the problem is the stat rarely contributes to doing actions that help contribute to the wincon (winning condition of the game). I mean it's nice to evade enemies but it's usually obviously better to just outright kill them or even neutralize them outright while they remain in play(so they don't go back in the encounter deck if it becomes reset).
2) Their 2nd best attribute is possibly investigate (though of course it would depend on the actual investigator pick in general). However their investigate support cards at average at best (lockpick being a once per turn action).
3) Their cards are somewhat themed towards getting more actions per turn, but since they don't particularly excel in any wincon actions, having more actions is really not that useful. An investigator who has a higher chance of investigating successfully with 3 actions is better than an investigator with more actions but lower odds of investigating successfully.
4) Rogue cards are themed towards getting more resources/supplies. Having more resources is nice, but the problem is actions spent on gathering more resources doesn't directly contribute towards to help winning the game. Secondly some of the decent cards for rogues require a fair amount of resources to play. I wouldn't say spending actions to get more resources just so you can spend actions to play high resources cards action efficient.
5) They have a few fast cards, that's nice but they very rarely help deal with a problem like Lucky! for example.
In summary I feel out of the classes, the Rogue is the underdog class. Their cards seem to synergise towards being potentially really good, but that's all there is, the potential. In practice they just feel clunky and don't seem to particularly excel at doing anything well. A lot of their cards should be more cost effective to play (cost less) and if being fast and versatile is theme the Rogue class is going for, they should have cards or ways to help them set up their board state faster say opposed to a mystic.
These are of course are just my thoughts, I'm interested in your thoughts and experiences on playing the Rogue class...