This is the same thing countless players both old and new have been saying(and asking).
The company is bringing out more and more content(games) while the original ones seem shelved. There is more money to be made in the newer ones.
I'm pretty sure if G4took a look at DL now in comparison with AL and DL when it first came out it would not get the same level of praise as when it came out. Simply because barely anything has changed.
I know I'm going to be asked "if you complain so much, why keep playing and spending money?"
Because I hope by sticking around and playing more content will be added. It may sound stupid but I'm a gamer loyalist.
If players jump ship there will be no reason for spacenexus to do anything for DL.

In the end we all choose to stay or play as is.