Villain would have to push wider than nash for it to be +ev
According to my (very small!) database i face an open shove between 3.0 and 3.6 eff BB about 70% of the time, which is tighter than nash. And we only have ~31% against it. With this we lose -0.02*3.3 bb = -0,066 BB on average. On the other hand its nicer to double up from 3.3 to 6.6 rather than from 2.3 to 4.6. So i guess it doesnt really matter?
however, found out that few villains limp/fold at ~3.3 bb. so shoving over limp should be profitable here