The difficulty was upped considerably, of course.
...
AI3 isn't to be fail decks, it's supposed to be harder.
...
So no, it's still pretty easy and rushable with upped decks, but with un-upped, it becomes quite hard.
Your last words...thats the key for me! Dont get me wrong: I personally have no problem with beating AI3 anytime, but i noticed the raise in difficulty...
I think the current balacing has some major flaws concerning the "fun-factor":
The new Players point of view: The need for quite a high amount of electrum to even collect common cards...so you NEED to grind/farm - especially as a new player -> so in order to be at least a bit succesful you have to concentrate first on "the one, very good farming deck" - unupped of course -> the new AI3 makes this even more vital AND makes gaining your first 10K electrum quite hard and time comsuming without much progress...in conclusion: the current AI3 makes it harder for new players to even collect a solid base of common cards while limiting them to only one working deck for quite some time -> not much fun -> for new players there should be a MODERATELY difficult way to acquire a solid collection of common cards to allow them building the deck they like to have.
The Vetereans point of view: Even when your playing quite some time, i imagine there are always some other cards that could be upped, so constantly need some electrum...so your looking for the best/fastest way to gain electrum...and it seems that speed farming AI3 offers the most gain - and THATS WRONG!
imho AI3 should be a moderate challenge for new players and offer suitable rewards for new players...but fighting against T50 (or T500, when its implemented) should offer much better rewards, so that these really good and effective upped farming decks wont raise the difficulty for new players...it should always be much more worth it to take a chance on higher levels, then to constantly win fast on lower levels.
Looking around it the forums and taking a look at the latest patch (love the new cards, btw, great work!), i more and more get the impression that the veterans point of view is dominating...which might cause some problems acquiring new players to this great game....