It's almost to the point where there's just too much AA available, lol. We're up to a dozen special missions all rewarding 300+ on top of our regular daily/weekly gains. I doubt it'll be like this each "season" or whatever, but even if it's not we're not even halfway through this one (I think) and I've already basically run out of stuff to buy.
Got every single cosmetic, got all the cheap gold and elixers and shit, got the legendary starter and the ascended gear (I've now got almost a full zerker set which is nice!), now I'm just blowing AA on obsidian and clovers and shit because I genuinely don't know what else to really buy. I'll just be dumping AA on the expensive gold and T5 crafting mats by the time this shit wraps up.
Which is great though, because even if they do dramatically reign in the special missions it means that we won't have to worry too much about farming a lot to at least get the cosmetics from a refresh. And it should make earning some older stuff that's in the "vault" a bit less of a concern, too.