Doctors differ patients die

As far as I can see you are both correct

The problem is actually TXV's not the head pressure, this do not operate correctly at low pressure drop.

Flooded condensers are not much used in the circles I travel in, perhaps it's just not cold enough in Ireland in the winter, it just about freezes.

Large amounts of subcooling increase system cycle efficiency, but cause liquid distribution problems.

We use EEV's (Danfoss) and float the heat normally.

where we are employing heat recovery we use the original condenser for subcooling, controlling the heat recovery condenser at 45 deg an dthe subcooled one at 30 deg c, increases the standard comercial type system C.O.P from 2.74 in the summer to 3.38 and only slightly reducing the C.O.P from 3.48 compared to floating head in the winter.

Kind Regards. Andy