I mean, the OPs suggestion would make them more like regular bunkers in power level and cost, but give UKF an unique mechanic where you can bolster the emplacement with an infantry unit. It could work.
It would only work with an overhaul of UKF infantry to go with it. They already struggle with field control with expensive squads hogging pop cap. It's not like they can buy a combat engineer squad to man these things with
And even if they did roll out an anzac analogy to ostruppen, I'm not sold on anything that encourages building more emplacements, instead of zero.