It worked great then; it should work now.
This new design is single engine, though, without the troop/cargo space behind. Probably can't carry as much ordnance, either.
The OV-10 is a great plane for what it was designed to do. And looks cool, too.
We’re flying a couple Broncos over Iraq right now.
http://www.thedailybeast.com/articles/2016/03/09/why-is-america-using-these-antique-planes-to-fight-isis.html
I realize the twin engine design is heavier and more costly but... For operating over water or rough terrain where there aren’t a lot of options for emergency landings that extra engine is a nice safety net. I’d favor the OV-10 design over this thing. Though if cost/weight/size were primary considerations then maybe that changes things... Depends on the design constraints...