>>8756825>But are they still ok?
To answer you question OP, No. Fuck no. You see the game of 40k currently revolves around fast vehicles, melee combat, and high strength low AP shooting. Necrons get destroyed by all three of these.
In melee combat entire squads of necrons are destroyed in a single phase of combat with not a single god damn thing you can do about it. Doesnt matter if you have a res orb or the WBB rule, your ass is dead and going to stay dead thanks to how the current rules work.
Unlike 4th ed vehicles are no longer an over priced death trap and almost every squad in every codex has access to at least one type of transport unlike before, yes some armies include several options of vehicles while your codex has none. Infact the most current codex has seven different types of transports for them to use.
Now the whole other armies getting transports and you don't part doesn't sound so bad, and its not you can teleport, but the fact is they use those transports to avoid your shooting and to tear your phase off in close combat. Necrons used to be able to deal with enemy armor until the rules on glancing hits changed. Now a glancing hit does basically nothing against a transport until its way to late.
In order to combat vehicles in todays rules you need high strength weaponry which is designed to kill vehicles. Necrons have a few high strength weapons, but the amount which can be put on the table is not nearly enough, some games it really feels like grasping at straws especially against mech guard.
Speaking of guard, high str low ap weapons will be your bane, unless you bunch up like a faggot around a res orb. Which is probly the worst way to play necrons as it makes destroying your entire army in one phase of melee combat that much easier. Though some people swear by it.