Feedback based on experience tied to Scarlet Blade.
If I'm to focus my experience on just what I get through Aeria, I would have to give a mid score at the highest.
One reason is that the Aeria Ignite Loot Box has scrap items that are only useful to be sold for game money to lower-level characters to whom such an amount would make a difference. Odds on getting better items are too low. Including Hearts and Spades cards that have not been incorporated into the game merely ties up item slots, so smarter players just have them sitting in the AP tab for now hoping the Replicubes will have good items. Odds on the best items seem to be impossible for all but a few players. I recommend getting rid of the scrap items and putting the Hearts and Spades on hold until incorporation. Bring back the Hexweaves, and improve odds on the more in-demand items to encourage players to keep using Ignite. Bring in the Fetch Datachip because it's a very useful item. It doesn't cost very much, even so, so players might decide to just buy it.
For the Shop, holding 1000 AP off sales occasionally might help. The prices can be eyebrow-raising when compared to the amount of real-world money it all translates to. I highly recommend getting rid of the (un)Lucky Boxes because even though players may occasionally take chances with them it is only because they don't mind the alternate items. I know of many players who say they avoid getting the Boxes because they know their chances of getting what they bought them for is low. Aeria therefore does not sell as many Boxes as they would probably want to -- simply including the odds on drawing each item might help with that. Also, I saw that early on in the Facebook timeline there was an event where AP was given away. Bringing that back could encourage game and forum paryicipation if done right.
I don't know who decided to merge the Servers, and many players have taken it as a sign that Scarlet Blade is going down. I agree with some suggestions that Servers based on time zones and when one faction or another seems to be more dominant might help the game due to balance issues, and also due to timing during events. I'm not sure how this could be solved, however I am clear that a single server with 2 channels is likely insufficient for an MMO the publisher wants to be popular and survive. Scarlet Blade is conceptually interesting in its setting, method of play, and with many of the weapons, so I do not want to see it go into decline or die.
The most important factor in preventing the game from going down: listening to the players with an emphasis toward the game experience, instead of toward profits. Occasionally, anyway.