I prefer clean casino webpages, rather than flashy and full with images. Buying a casino script has it's pros and cons. The lack of uniqueness and originality can be seen as a flaw. I would remove the chat feature, since I hate using chat when I'm gambling, but that's just me.
Of course, you also need to offer some kind of simple program so that you can try out your site with the help of free bonuses. And by the way, BTT users could just get some small priority in this program, since it is here on the forum that the OP can get the most valuable recommendations from the almost professional community.
I think the OP has figured this out by reading the posts in this thread.