Datacron Usage

PVE already has other effects, such as platoons in TB, data disks in conquest, global modifier's in AB etc. So they are tuned to be challenging. I always thought datacrons could make it a bit messy. But would increase the value in chasing them if they have PVE usage too.

Because in PVE it would mean you don't have to spend as much in resources and money to build your roster.  If you had datacrons to breeze through everything, you wouldn't spend anything towards that.

In PVP it doesn't matter because there's a winner and a loser and CG pays out rewards the same regardless.  (Even if cheaters creep in since they don't do any recompense after a cheater is confirmed and banned.)

Because then PVE would have to be tuned to datacrons. You don't want that. 

Call me cynical, but as a long-time player, my belief (as I've wondered the same question sometimes) is that the OP datacrons would make portions of the non PvP game too easy (like Raid, ROTE or Conquest), thus increasing player's rewards, and reducing the likelihood of players having to spend either crystals or $ or both to make those portions of the game easier (like for conquest pass, or needing to gear up/relic specific toons for Raid, etc).  For PvP purposes, they know that some players will pay whatever it costs to be the "best", and by always having the current OP datacron, that is much easier to do. So in that scenario, they're increasing the chance of players spending crystals or $ or both so that they can beat other players and be the "best" in PvP.  Just my 2 cents though.  I liked the game better pre-DC, but what are ya gonna do?  Not sure about ship datacrons, I'm sure they will come out eventually if they will generate revenue