I don't disagree with that at all Col.
However, Freeman & BOS definitely played wide with meaningful runs into the penalty area & Eze was not part of a trraditional midfield three as he performed the "number ten" role. All three of those players did defend when required, but it appeared to be their secondary role (which is good as far as I'm concerned). Freeman was probably deeper than BOS at times, but never in a holding role. I can't recall our midfield three spreading across the pitch as you described as Freeman, Eze & BOS were never deep enough for that. That doesn't mean they won't be during league matches!
My inconclusion in our system was caused by Luongo going further forward & more frequently than I would have expected in a 4-2-3-1 system. i would have said that yesterday, we more often had a front four than a front three! Again, that may well not be the case in league games!
What I think is certain is, as you stated, that our management will react during matches when required & we will be more fluid.
Thanks for the very interesting insights.