It's a move in the right direction, but is there any evidence that KA Handling is doing "business" rather than merely repelling all the bigger traffic which is the obvious and absolutely guaranteed result of such charges.
Obviously, the entire business case for KA is whether the traffic that is attracted via their fuel discount brings more money to the airport than the value of the traffic that is lost.
Sadly, I gather that the reason the before/after-hours indemnity system was dropped was because a specific operator was abusing it. It was a good system, which enabled 8am non-radio departures on long foreign flights.