Normal Type Fighters

I'd say always replace one machamp with the breloom, with the rebalance to stats and effectiveness increased, breloom outshines machamp in match ups on occasion, and still maintains higher DPS than machamp.

Haryama is, because of the rebalance, a factually worse machamp, less DPS and TDO. Blaziken, dont know really, but I feel it'd be better vs ice and steel

Lead with 1-2 Breloom and pad the rest with Machamp.

Blaziken is equivalent to a Hariyama, but runs the risk of not getting off its charge move (1 bar Focus Blast) when Hariyama might get off its (2 bar Dynamic Punch).

Nope... If you have six with decent IVs at a reasonable LV .... No need to replace your Machamp army with Breloom Blaziken or a Hariyama the difference in actual game play is negligible at best