If the notion is a blanket negative effect above a certain OP cost, then we would be nerfing hullmods because some smods save more OP than others, rather than some hullmods are better than others. That is, a hullmod being more expensive doesn't necessarily mean it is better and the new incentive is based around OP savings rather than hullmod viability. Operations center is a mediocre hullmod, but it costs quite a bit of OP so it likely gets nothing. It gets nothing not because it doesn't deserve a bonus but because it's expensive. I don't necessarily agree with that decision as hullmod balance isn't perfect itself and we are building another system of balancing on top of it. Now this example is just an assumption, but the tone of this change seems to be based around cost and not performance. If there is an smod bonus for this example in reality, then that would be contrary to the original intention.
Otherwise, I argue that perhaps some hullmods' effects and their costs should be looked at before they are given some smod effect based on their current cost...