We have seen already about this new changes on the new site about a week 2 weeks as of now before this announcement.Comment towards on it, i do like the interface which deposit and withdrawal tabs can be easily located compared to the previous GUI and also now the withdrawals are instant if you do request it directly. This is really a big change i do consider.
AFAIK the instant withdrawal is not a new thing, they were instant before the huge updates. Do you think it was not instant previously? Indeed there were some cases that made the withdrawal take longer time. Hopefully it wont happen again in the future so there will be no more scam accusations because of the long waiting withdrawals.
It's hard to predict the withdraw times.
In the past they were usually almost instant unless they were over a certain amount or you tried to withdraw to a unique btc address.
Later on only during the weekends they were delays, basically they processed the withdraws manually then and sometimes you had to wait until like Monday to get the withdraws.
But sometimes even on a weekend or even to a new unique address they process them almost instantly.
I don't know if they hired more staff or if they made the withdraws automatic if below a certain threshold.
I think they have algorithm to detect automatically which withdrawal can be done immediately and which needs to be checked and done manually.
I can't say this for sure because usually litecoin have really fast on their withdrawal but when it comes to bitcoin it will takes time no matter how much you withdraw. And like you said may br some big amount will be processed manually since there is limit on their hot wallet plus they are they will check on everything before they can release the big amount
