Maybe. But last season IB with CBMM was laggy while Control with SBMM the connection felt fine (for Destiny standards). I don’t know why IB has worse connections, even with Freelance, so it shouldn’t be dealing with pre-made fire teams of people on different continents.

That is your experience. I for one had no lag under cbmm

Not just mine. My friends each had similar experiences playing IB in freelance and going back to Control. Before Crossplay I rarely ever saw any lag in CBMM or SBMM. Whether it be control, comp, IB or anything else.