I think they should have redesigned the gas system more so than they did. There is still that contact between the piston/operating rod and the gas block that can cause accuracy problems. The machining is done better in that area to my understanding so that the piston/operating rod mates up to the gas block squarely.
The best improvement of all is the slower twist rate in my opinion.
I wouldn't mind getting a tactical if I knew I could get enough of the factory mags for reasonable price. It would be nice if a person can get a version with a bayonet lug but I think all those are LEO models.
Maybe I am wrong on that.