I hope there will be further updates, especially to the withdrawal fees section for other supported altcoins. Of course it will also be very useful for many owners of these coins (alt-coin owners)
If you are asking about displaying withdrawal fee information for altcoins as well, that is not something I am planning to do. Some casinos support 10 or more altcoins. Keeping track of all that info is time consuming, and I don't see a good way to include all those numbers in the OP and still making it look presentable and pleasant to the eye.
And it is correct that OP is not going to deal in detail with the withdrawal fees for each altcoin in those casinos that use a lot of altcoins.
The data provided by OP, for which we are grateful to him, provides excellent information about the range of commissions a particular casino operates within.
And about the commission for the withdrawal of which particular altcoin, the user himself can guess or even learn in practice.
In any case, the OP's spreadsheet is very useful and I hope the OP will keep it up to date.