Concealment seems to be in a real good spot for 7.0 damage wise (probably too good) and defensively avg (still had immunity roll and getting some new damage reduction passives)
Lethality build is looking very similar to current patch leth, other than the corrosive assault options. Every other spec (jug n mara n others) are looking to have very big dmg buffs, so I'm not too sure leth is going to match up dmg wise to rest, unless this was intended for this melee dot spec.
Continuing for leth, defensively its pretty much dead on arrival. Unlike concealment, which has immunity roll (on GCD) and laceration DR utility (off GCD), lethality has nearly nothing off GCD. Especially with AOE DR removed from operative in general, I can't really see lethality being very raid viable. Currently, classes that already lack AOE DR are disliked in raiding, and with the removal of Revitalizers, the only off GCD defensives are really shield probe and evasion, which is looking real grim for PVE.
To sum it up, in PVE lethality will only have shield probe and evasion (very niche situations) off GCD defensives, unless its expected to actually self heal rather than do dmg in a raid setting, so while the removal of AOE DR is acceptable, at least give Revitalizers to lethality ops exclusively so that they got some survivability. In PVP, operative's greatest weakness is already the lack of reactive defensives to big amounts of burst, especially for stun situations, so the lack of revitalizers is going to make lethality operative a very fragile spec in pvp, and is also rather difficult in solo que cause of the burst meta. Lethality has both glaring weaknesses in PVP and PVE atm, and can't really tell the design goal of lethality for 7.0. Looks like pyro pt, but without the giga dmg and weaker passive defense, just overall unfortunate.
TLDR; reconsider Revitalizers for exclusively lethality ops, or some kind of passive defense for lethality. Med looks unchanged, and Concealment is getting some passive DR, still has roll immunity, and top tier dmg.