So I was rereading the final arc of TT vol 3, and I came across this image.
Aquagirl - Lorena
Argent
Blue Beetle - Jamie Reyes
Bombshell
Bumblebee
Flamebird
Hot Spot
Mirage
Miss Martian
Offspring
Prysm
Red Star
Robin - Damian Wayne
Speedy - Mia Dearden
Supergirl - Kara Zor-El
Vox
Zatara - Zachary (cousin of Zatanna)
Plus the main members of this era.
Beast Boy
Kid Flash - Bart Allen
Ravager V - Rose Wilson
Raven
Red Robin - Tim Drake
Solstice
Superboy - Conner Kent
Wonder Girl - Cassandra Sandsmark
What I noticed, and have known for a long time, is that there are a lot of legacy/copy cat characters running around. Not only with similar powers and skills but also (with respect to the Robins, Arrows, Flashes and Wonder Girls) wearing the same costumes as their predecessors. Before New 52 TT came along with their Tron Legacy inspired costumes, most of the vol 3's main cast wore nearly identical cloths as the NTT cast and had the same set of powers as the NTT cast.
Then you have things like the 4 bow and arrow Titans/YJ members: Roy Harper(Speedy/Arsenal/Red Arrow), Mia Dearden (Speedy 2nd), Artemis Crock (Artemis, not the be confused with either the goddess or Amazon), Suzanne King-Jones (Arrowette).
I know legacies are going to exist, but just looking at the Titans and comparing them to the rosters of the JLA, LOSH and JSA, there doesn't seem to be much variety. That and the power set (main stay rosters) seems to be a constant reuse of the same abilities or someone with something similar. E.g. substituting Superboy for Starfire.
What should be done to either decrease the number of legacies or make them different enough from their predecessors?