My parents car has French headlights fitted, as they live there, and when they have visited here they put the deflectors on - however, some modern lamps dont need them, and can be adjusted to suit.
My own car does not need them in France, I merely lower the beam just a fraction, and all dazzle goes!
I was told that this is because the headlamp glass no longer incorporates lens prisms, and so the deflectors which mask the prisms which light UP the nearside verge are not effective anymore.
Others might disagree!
I think the increased dazzle you have noticed is just down to a general atitude of not bothering to check or adjust anything in your car any more by many drivers. Front fog drivers are now endemic around us - a 4.5 mile journey will typically see 4 - 5 drivers with ALL front facing lights on EVERY day - and more when it is wet, which DOES cause dazzle!
I just cannot understand why the government does not advertise the fact it is antisocial, (like the old "I've been pinched" yellow box junction adverts) or detail a police car to pull them all over for a week or so and deliver the message PERSONALLY!