I really don't get this idea of a quango to hold the deposit.
Even leaving aside the issue of bureaucratic inefficiency.
From my own experience as a landlord in the vast majority of cases, I repay the deposit with no issue. Even if there is some minor issue, like the oven or fridge are dirty, you give back the deposit, it is easier than arguing. If there had been a good landlord tenant relationship for 6 months or perhaps much longer, who wants to end it with an argument.
The tenant often does not pay the last months rent, saying "take it from the deposit". I don't like this but the landlord is totally powerless in this situation, again usually there is no real issue..
Enter the quango. When the lease is up what happens? Will they write to me asking if it is ok to release the deposit. Will I be given time to inspect the premises. I generally give back the deposit when on the day the tenant leaves, this will hardly happen with a quango in place.
As a landlord any premises can be faulted, I have never received a house back that didn't need to be cleaned. Thats €400 straight away.
Dirt that a tenant leaving really does not notice, behind the fridge for example, stands out a mile when a potential new tenant comes to look.
I think it will become routine for deposits to be withheld, for reasons that can easily be explained in correspondence to an anonymous quango, reasons that would never be mentioned face to face between people who have had a satisfactory relationship over months.
Just as a further piece of evidence that this deposit holding Quango will not improve things. A relative of mine rented a property in Belgium. The system there is that an "independent" agency inspects the place when you leave. The agency then prepares a report to say what part or all the deposit should be withheld/repaid.
In this case, the agency suggested that an amount of 110% of the deposit was owing to the land lord for damages. i.e. that my relative should lose the deposit and pay another 10%. Obviously I am biased but I rely do think that any reasonable person would say the the property was handed back in excellent condition.
After enquiring from other people who had rented in Belgium, they were told that this is normal 110% is what they alway say unless there is a real issue when the say more.
And the normal thing to do is dispute the finding and move on. You won't get your deposit back but they won't pursue you for the extra 10%.
I admit that on principle I hate the idea of a government agency interfering in a private contract between landlord and tenant. But in practice, this will be good for landlords, it will be come normal practice to say that the house needs cleaning after the tenancy and that you want to keep the deposit.