It's an airport with people and a finite space, what do you expect ?? If you're a Choronaphobe living in fear, than stay home where it's nice and safe.
Thanks for that perfect display of attitude which shows exactly what's wrong with MAN!
What would I expect? Well, use of the available space to achieve social distancing wherever possible. They're not exactly overrun with passengers right now, so using alternating lanes in T3 security tensa-barrier-land instead of every lane would be a start. Some more hand sanitiser stations perhaps. Not revolutionary stuff, but if you're happy with the way it is, we can pick up the debate in a few months' time when any last vestiges of domestic travel on journeys where people have a choice have evaporated from MAN.
Not sure of the original poster's experience, but that's certainly mine from a recent trip through MAN. I'd say I'd continue to avoid T3 like the plague, but that might be misconstrued about the status of Covid-19.