3-2-2-2-1 Butterfly still works well, don't worry. 3 DC vs 1 AMC and 1 ST, DML/DMR vs ML/MR, 2 MC vs 1 MC, AML/AMR and ST vs 3W defenders. His DMC still waste against Butterfly. Beside, if you want, you could turn 3 DC to 2 DC and 1 DMC, it's ok, not illegal anymore.
But,in case you want to change tactic again, so use 3n-1-4-2, mix passing, no counter, no offside. His 3W defenders system is bad choice against 2 ST and ML/MR.