CapnZapp
Legend
This sentence implies the imbalance was intentional. It most probably was not - the logic is that implementing readied actions this was was simple, fast, and easy. In other words - good enough.I still don't find it quite logical to gimp some classes less than others.
So yes, some classes are impacted more. And you might even say the difference in impact is significant.
But all of this forgets the greater issue - that readied actions are meant to be used sparingly. Even a significant imbalance can be insignificant if it comes into play seldom enough.
So overall the general idea is to encourage characters to seek out other courses of action than one that requires you to stop and ready an action. As long as you can do something else: do that instead.
That a rogue might be less inclined to do so can be chalked up to their cunning
Point is: even if this isn't a direct result of the rules, it's not inappropriate that out of all heroes, the rogue is the one least confounded by something like blink! And even if you don't buy this argument, the reason is that it wasn't considered important enough to make an exception for single-big attackers like rogues (and perhaps a smiting paladin).
(If you now go "but what about the Wizard - having to ready a spell is a major pain in the rear?" my response is "A competent Wizard would have dispelled the pesky magic instead of allowing herself to be led into readying actions by it!")