What needs to be done is get rid of expertise and cap gear at 126 rating. (high enough to require work, but low enough to not require operations) Any mods or gear above that would act as if they were an item of the same type with 126 rating. The other solution (that I wouldn't recommend) is to enforce the same sort of restrictions that apply to PvE progression. In PvE, people are generally not allowed to join an op unless they meet a minimum gearing requirement. For warzones that would have to be automated, grouping people based on the most expertise they can equip, taking current gear and inventory into account. (but not cargo hold) This would result in PvE players dominating the 0 expertise bracket but extensive PvP would allow you a level playing field in the higher brackets.