Is there anyone call 'Paradox' as a company name before this great company whose name is Paradox was founded? Meaning of a word is differs as people by people and case by case.
There is a person who called every change of game were exploit, but who agreed with him? Paradox changed that meaningless and endless clicking for papal controller, but is there anyone, except him, who called it as an exploit? Paradox changed the way ROTW westernize, but is there anyone, except him, who called older system as an exploit?
There is a person who feel bad for fixing exploit, but is there anyone, except him, who feel bad for hard working programers who make a game which we are playing? Diplomatic relations are ticking month after month. Though we could exploit it to earn some more, it is not intended. We can know that it isn't intened like that if we can think like at least level of formal high school student.
Simply, exploit in game means the play which doesn't follow the way developers intended and get interest from it. Wiz and Johan are main developers of EU, and the way which they didn't intend is an exploit. Who can oppose it?
Paradox continuously fixes exploit, bugs, bad systems and unhistorical features to make a game greater. Paradox have done well, but some people has complaints which are totally unresonable and they want a game to be good for just them, not most part of players.