My opinion hasn't changed from when we first got the new AIs. We should have a mixture of the 2, as the old ones were easier, and better for newbs.
Sure, the won't only get the easiest ones, but they can't have it too easy.
![Tongue :P](https://elementscommunity.org/forum/Smileys/solosmileys/tongue.gif)
The variety is also more fun for grinders. More fun grinding = more people sticking with the game.