OP hasn't been active since 2020 he didn't respond anything here I'm not an active player here so I didn't pay much attention to it
from what I can see it's clear the interface is different and there has also been an update to the reward system just try to pay attention https://gamdom.com/rewards/explore

I wouldn't notice Gamdom's update without your comment... The site looks better than before, I find the navigation much easier...and like many other casinos, the chat is now on the is on the right side.

There are significant changes in the UI of Gamdom on this new version. I can't see any other changes except the UI at this moment. But they have added some new reward system for the users. Deposit bonus, cashback and profit bonus weren't there before. Anyway, the license validator is showing an error after the update. And there is a little bug in the blog page. I have informed it to their support team. Hopefully they will fix those soon.

I am going to talk to the owner about making a new thread for Gamdom3.0 and being active here. There's more to the update than just the UI also. They have now added dice as well. I'm exploring the site but for now I think it's worth checking out.