Cheating AI is quite frankly, a symptom of lazy development. It happens when the AI just isn't good enough to compete on equal terms with the player and it ruins immersion.
Now, I'll grant you, developing high quality AI isn't easy and I get that paradox will have to take *some* shortcuts. Indeed, EU3 has one of the best AI's or at least illusions of AI's I've come across. But let's be honest, that isn't very great praise given the state of AI in games today.
I really hope Paradox puts some serious effort into minimizing cheating and making the AI able to compete with us on our own terms. Maintaining a massive army isn't that hard quite frankly, if the AI can focus on a strong economy then it will be able to afford a strong army.
I for one play EU3 on the principle that gold wins wars, and it usually does, certainly that isn't all there is too it but a strong financial AI means it can play with fewer pillows sown under it's arms.
I really only have one thing to ask from Paradox, and that is that you do your very best in terms of AI, make it a top priority and try your best to impress our pants off.
Europa Universalis is never going to be the prettiest game, it's never going to be the most action packed game and I thank the paradox log on my screen daily for it, because non of us play your games for the gfx or heart stopping action, we play them because you make games that challenge us to think.
So make an effort, splurge on an AI specialist or two, we all know EU4 is going to be your biggest seller in years, you'd have to literally make a concerted effort to have sails not top EU3 and CK2. Speaking of, CK2 has brought a large new audience to your games, some of whom have already stopped by the #pdox channel on quakenet asking for help with EU3, I'm sure you've got a shiny graph detailing a boost in EU3 sales post CK2 so EU4 is set to become a money maker in a big way. Consolidate your gain by making EU4 have the best AI you can possibly get, with as little tacky cheating as possible, and you'll no doubt see a positive result from it on your balance sheet.
I mean let's be honest, Paradox seems like a developer who enjoy playing their own games but in the end it's the money that rules, so be greedy and make an AI that'll stand out.