We can't answer that for you. Some destinations in some cabins of travel went up, some went down, some stayed the same. Without knowing where you want to travel with those miles, and in which cabin, it's impossible to say.

Plus another way of looking at it is:

If the miles you needed went up, be happy that you can get more miles.

If you're not going to go for this offer, how else will you afford to take those trips? Just because miles needed went up does mean that miles are no longer a good value compared to cash. It still, as always, depends on the specifics.

However, this bonus is essentially just 3x miles on all purchases, but only if you make the required number of purchases (otherwise it's only the normal 1x). There are certainly better offers out there if you're looking around all of FlyerTalk. And this part is valid whether AA devalued or not! Ie, is this really the best way to earn AA miles, if you do choose to earn AA miles? If guess it depends on whether you're riding the World -> World Elite train every time it departs over at Citi or not.