Not really...Most special weapons (save from regular flamers) have 6-10 str, but they're so few and far between it doesn't really matter. The worst thing for you to fear as an ork are Terminators, flamers, and Mass Fire.
Terminators really arent THAT bad, but they can be if you don't deal with them. If you can somehow get 20+ boyz whacking the utter piss out of them, they will die
Flamers you're just fucked, unless you have 'eavy armor or 'ard boys, but meh.
mass fire is a given, throw enough dice at something it's gonna die. Boyz are the rule of thumb with this. "What can I throw the most dice at X." the Majority of the time it's boyz. Slugga for melee, Shoota for Shootinmee. Sluggaz keep da gitz from shootin at da ova boyz, Shoota Boyz bring da noiz. I've had a squad of 20 shoota boyz hold off a full squad of Khorne Berserkers just from overwatch alone. Killed about 5 on the first charge, they failed the distance, my turn, dey felt dat dakka, by their second attempt they had at most five Berserkers. Once CC came into play I lost like eight boyz, but they just murdered those Spiky boyz.
Datz not to say Slugga boyz don't bring dat Dakka. Slugga pistols have this weird luck about them. Every time they shoot they almost always have 1-4 hits on them. Sometimes they actually outshoot the shoota boyz. It's really fuckin weird.>>21896391
Deff lists are good still. The only drawback is that the Actual Dread, got better and worse. Against necrons you might as well bend over and drop trousers, you about to get raped son. Against nids? Oh sweet merciful christ the rape of those bugs is painful for even you to watch.