You can make anything look good on paper but all this results in is more tentativeness and less precise tactics. As it stands it just makes the game more punishing because you reduce information given to the player without giving him tools or options (i.e. gameplay) to get it back.
There's enough tools available. Knowledge of RC quality in neighbouring realms is something that comes overtime, just as it does for enemy realms. All you really have to do is fight them. You don't even have to, you could easily send in someone to scout their regions, or just send an army. A sample of a couple of regions will do, then compare their RCs to your RCs and you have an idea of how to compare your men to their men. But again, you could always just fight blind that first battle or two and depend on your own troops. And the only way that's going to happen anyway is if you're fighting against someone far away, any neighbour shows you that sample every minute of every day.
