What you can never make up for is the disc regen. UNLESS its given to us in a passive or a new set bonus. Then I'll give up on L4N lol. But ya, this frees up a passive and enables the best mobility/utility with the use of discipline.
What happened with the last gear lvl increase is the rolls got better. Because the stats where important. Now they are just a starting point, but can be made up for with paragon points. The new i70 Nats set will have to have some better bonuses if its going to even hope to compete. Especially with the nerf to prep.. only restore 30 disc? BS. Cool down reduc will be needed.. but stacking disc doesn't look so OP anymore.. sad.
So to me.. L4N is still looking great. A good weapon is what gives you true power. A nice enchanted/tuned ilvl70 weapon will make all the difference. Look at the L4N users. Some use WF and get 200-250k dps. Manti gets about 300-350k? Can be very similar gears but the major difference is the weapon. Because manti gets that dual socket... but look at the dps increase (in theory). So theory craft what a new i70 weapon will do for a legacy set user? I think they'll do just fine.
For me, its gonna be a Windforce. The knockback is just want I want to run with my L4N in ROS. Mobility, control the battlefield with CC and the glory of D2 in my weapon. A nice 3k WF and L4N is what i'm dreamin of. o_O
I guess right now.. with 10 p100s... ~ p450 in paragon 2.0.. Ya its gonna be a grind fest in ROS. Good times!