What arion said, plus pass completion% that is 84% or lower usually means long passing, instead of being a speed test, i feel its more your defender's positioning stat that gets checked. High P&M players will break offside traps more often, see Jamie Vardy and Michael Owen. But if they have a way unbalanced stat line say 100 defense 105attack 110 physical, i would definitely play a zonal offside trap if my CBs were flat 105s but a man offside trap if the forward was alone and I had a defender that was 110def 100attack 110p&m. it definitely can be a double edged sword but it is very effective in certain formations/situations. Like i would never play offside trap vs 4222 hexagon. All it takes is one of your fullbacks to put them onside and you are pooched.