Few thoughts on this
1. On manual attack you will destroy rogues fairly easily with many armies
2. Rogues on defense is a bad idea (see 1)
3. After PE (?) the AI for continent map changes so that rogues aren’t targeted if there are other troops in range so they’re less useful there (the original AI is used in GE and battleground in all ages)
4. In battleground it takes too long to place an army with rogues especially in SAAB as there is no quick way to select them (yes it’s daft) so experienced players will tend to use an army with one troop type because you can spam it faster.. that sentence should give you some idea of the level of combat in this game.
Are rogues strong - yes in some circumstances. OP - nope. No change needed. Once you get into this you’ll be much more concerned by troop balance issues (the fact that at least 80% of them have no use whatsoever and others like hovers are OP for several ages), the complete lack of army management features, and the stupidity of the AI - and rogues will no longer be a problem for you...
This all reminds me of when my kids tell me they’re scared of some monster hiding in their room, and as a responsible parent I avoid telling them that there are real things in the world that would better justify their fear.. welcome to FoE