I ran these two today and had a few issues but it was not impossible to do, if anything it should be easier as DPS. The content is exactly the same as the instances you get through Duty Finder (except the party members are your squadron) so I highly doubt they would nerf the content.

Brayflox went WHM and yes the bombs were awkward, but managed to Holy most of them out of the way. There was the odd occasion where I knew I couldn't move enough in time, so had no choice but to heal though the damage of a couple of them and eventually it worked. Casters should have more aoe and insta-cast type spells available though so can't see it being a problem for them.

Wanderers Palace did as SMN, and honestly the only issue I found with this was that it took a long time to defeat the last boss because the squad preferred to tank it on top of the Idol standards. The first boss was easy enough though, just be sure to Re-engage your squad to attack the spears as soon as they appear.