I hate security check, I hate withdrawal manual checking ... although it is intended to protect both sides between the customer and company ... at some point you will always feel disappointed/ pissed off waiting.
When the 2FA activated ... instant withdrawal shouldn't be a problem at all , and regarding the ip address changes ... how if you guys implement a security login whenever user logged in with different ip address.. it requires email confirmation or so.
Also to prevent bonus abuser playing - won - can't withdraw cycle .. what if you guys simply block/freeze them before they even play. So you won't bother with such annoying complaints.
Yeah, withdrawals have always been a troubling issue in crypto casinos. Not just here, aside from maybe primedice all places I have ever seen had issues with it because people may abuse it and that is why casinos has to check it and that creates a ton of issues.
You can't just let the people withdraw automatically, that way they can abuse you and you will learn about it waaaay after they abused you, it would take a lot of bitcoins for you to realize that, people could fly under the radar by stealing very tiny amounts but constantly do it and increase it over time. That is why it makes sense for casinos to check every single one of your withdrawals, however that also means people who do nothing wrong will be put into pressure about their withdrawals for no reason at all. It is a very sticky at both ends issue.