More A-10s would be awesome, but that's just not going to happen. There's no support to truly reproduce the old airplane in the same fashion. The A-10 is truly un-replaceable. That doesn't mean they won't try...
See, this is why the people mistrust the military and military industrial complex. Here is a weapons platform that does a superlative job in its role, is highly adaptable, has greater loiter time to be on station within moments of the FAC call capable of accurately delivering a lot of death really quickly. And the thing that gets most people upset is that this is a platform directly responsible for keeping their kid in the infantry covered when things are at the worst. That the machine is relatively cheap and easy to produce a lot of just makes it all the more questionable of a decision in the public's mind. It's not like we are getting rid of the B-52 either for the same reasons. It does what it needs to do well, and reasonably economically. What was the ratio of B-52 sorties to B-2 sorties over the last decade? How many of each were lost?
To scratch develope a replacement platform for the A-10 makes no sense. The threats for the roll are the same now as the day it was designed. To do so would be a waste when we can ramp up the A-10 production to take on the alien invasion, in the end, it's gonna be the 30MM DU sabots that bust their crap.