This is one change I don't understand. Who thought it was a good idea to require units to spend more time idling at home? I thought the whole point of DoW2 dispensing with base-building was to allow me to spend more time in the field with my troops, doing troop things. With the nerf to healing aura, it almost pays to let your guys die, as you can reinforce and return to the field sooner than you will if you actually preserve your troops.
Put the healing aura back the way it was. If the problem is one or two unit types healing too quickly when at base, then fix those units. If the problem is that units are too resilient when under attack while under the protection of the base's aura, add some code to retard their regeneration while under attack. This code already exists: it is used in the campaign to regulate healing when outside of combat.