Honestly, I don't care about most of the reboot cast. If Bashir has no friends, he should have joined the Aventine, another ship or went back and got a job at Starfleet Medical. Kira is a vedek seems random, but still having a kai who likes the federation could be useful. Also how in the world is Sisko, the hero of the Dominion War, the second biggest war after the Borg Invasion, a minor captain on some random ship. Seriously, horrid. Also do the Prophet's care if he goes off, they can see every point in time so its not like they don't if he comes back or not. Also really should sisko not have some abilities or did he just not stay with the prophets long enough to pick up some stuff like telepathy. Still I guess we can look forward to sisko getting drunk and partying up, I always thought him and kira would be an interesting the couple. The emissary and the hand of the prophets. Also I am surprised Section 31 has not grabbed him yet so they can run some test. Still the DS9 cast has been gutted and most of the main characters besides nog and ezri seem to be in decline since the show ended.
As for the options, going back that ship seems to have sailed. And hell no to to new cast options, who wants the DS9 characters reduced to cameos in their own books for noobs. Those are absolutely the worst options. If the original cast is doing cameos then it is not DS9.