Clearly the answer is yes. High fees do affect a Bitcoin casino's profitability badly, but I am interested in what kind of solutions are you planning to fix it?
Is it enabling Segwit or shifting your business to accept altcoins like Bitcoin Cash?
Bch is not fully recognized to be an altcoin, some say it's just another btc.
No. Bitcoin Cash is an altcoin. They changed the protocol and split from the main chain. Plus do not listen to Roger Ver's propaganda. He is trying to confuse the general public.
AFAIK most bitcoin gambling sites are not yet using segwit (just yolodice, bustadice, betking, ..?) Most are using Bitcoin Core and it's not really ideal to use segwit just yet. But within some months Core 0.16.0 will be released with proper segwit support. I expect most/all bitcoin casinos to enable segwit by that point.
I hope so. Plus I will also try to talk to the reps of those casinos you mentioned and talk about their Segwit implementation.
If the bigger companies (coinbase, blockchain.info, etc) use segwit too by that time, the fees could seriously go down a bit again (not cents, but lower than now lol.)
I am not that optimistic. The NYA signatories might have their own agenda.
I am also curious to figure out if/how gambling sites can adopt lightning, but haven't been able to properly test LN myself.
The first services that will have 2nd layer scaling solutions will be the smaller companies because they are more nimble and it is easier to change their infrastructure. The bigger ones like Blockchain.info will have a more difficult time, and that will make them "obsolete" and fail.
Watch out for the next big webwallet, Greenaddress.it. I believe they will be one of the first to have a Lightning payment channel open.