I think people are seriously overreacting. From what I see all changes seems to be done with a positive intention (not saying that the balance will be better or worse, but their intention is to make it better)

They have been struggling to find a good and sustainable content delivery system since the start of the game, this is just the latest idea. And there is no aggressive monetization in it, it's still the cheapest model between all the main mmos. Expansion/content ratio got a bit more expensive compared to before, true, but it's hardly aggressive or expensive. To be honest we had it way too cheap until now compared to the average market prices, it's understandable. And until now they always offered super cheap bundles for old expansion after a bit, if someone prefers to wait a bit and save money.

And I'm having a hard time to see how more weapons on all elite specs + new core weapons can be negative in any kind of way (outside of balance concerns, but I haven't seen anyone worry about that) The new combat changes don't even require the new expansion from what I got...

And the new reward system is just daily/weekly/monthly achievements but hopefully done better.

If anything they are showing interest in making the game better and more stable