Seeing how four of his men caused some major issue without him or Iva, I think he’ll be able to wreck havoc as long as the admirals don’t get in the way
Of course they will get in the way.
Akainu was just there when Kuma came.
Either way the Revs only caused damage because it was a surprise attack in the middle of a Reverie, and they withdrew quickly.
If Dragon goes there now, Mariejois is already in full alert, and you have Akainu and Admirals who are currently in HQ, the Holy Knights, Cipher Pol, the Elders and Imu, and dont forget about Lucci, Kaku, marines and seraphims who will be coming back from Egghead eventually.
Revs cant deal with all that, so it makes sense Dragon is turning on his seafaring pirate mode and going after the red poneglyph rubbings and the One Piece.