I think this is an unusually large and pedigreed group compared to past years, at every tier (the minor league invites, the internal minor leaguers who might help in-season, the fringe guys on the 40 who might get a spot). Last year, with four of eight guys making 7-8 figures plus Neris and Morgan and Alvarez and Arano, we did not have big-name (if washed-up) NRIs or extra pieces from outside the organization added to the 40.
Sure, I would rather they pay the luxury tax for one more guy, but they have quality, affordable, controllable arms - if they are healthy and effective. Last year they had quality, expensive arms - if they had been healthy and effective. I wouldn't want to swap the former the latter. There's still only so many spots on the roster.
If Neris, Seranthony/Morgan (8th), Alvarez/Velasquez (7th), Arano/Suarez (middle), 8th guy TBD isn't a good bullpen, which of the above players would you give up on? My only answer would be Velasquez, if you'd rather get a proven reliever than a converted starter (or Pivetta, if he's the guy not starting). The available free agents weren't that robust. What happened to us (and the Nats) last year could have easily happened again.