integrating lightining and other smaller altcoins could be two interesting ways to go to improve the website too.
Adding more altcoins can be good but only if they are in demand and fees is not too high as well the liquidity factors also need to be kept in mind so that users don't face any problems while for lightning network the demand is good and network has capacity also now.
Yes, at least altcoins that have many holders and also transaction volume will be very good, supporting users can use the altcoins they have, especially using lower fees, it's also very helpful if added to the casino, even though there aren't many lightning network users, but with this option, it might be useful one day and will be used by many people in the future.
I also think casinos must provide services to their users because not everyone also likes expensive transaction fees. For this reason, it is necessary to add cheap transaction fees on certain altcoins because it makes it easier to reach new users who also hold certain altcoins to play gambling on this platform. at least it should be quicker to implement any idea than other casinos