Instant withdrawals wins the vote, I guess a lot of us really wants that kind of feature in sportsbook.
Personally speaking I don't mind if payments are sent within 24 hours because with sportsbook I usually cash my winnings once I have accumulated something significant while when playing casino instant withdraw is a must, sportsbook not so much but yeah if instant even better.
That's the kind of discipline I admire, but mind you, there's always a risk of letting your money sleep in a casino, if they go scam, your money will be gone, but then that is only in rare cases if you are betting a reputable gambling sites.
The odds is not a problem as they can get the best odds provider in the market, in terms of length of operation, it's important but I don't fully trust my money in crypto casinos, that's the reason why I don't keep it there, instead I have a frequent transaction to withdraw and deposit funds, so instant withdrawal is very helpful.
You must be doing sports betting at a small scale because I have been with people who bet big and all they want in their sportsbook is actually the highest possible odds because imagine betting on 2.1 odds and somewhere else 2 odds and you bet 1 bitcoin then you are going to miss like 0.1 bitcoins every time you bet.
Really huge difference for big bettors in sports, they need to get a good odds, you are right.
I think most sportsbook in crypto now has been competing well with betting odds already but based on the example, 2.10 or 2.0 is still a good odds as you are not paying a juice for it.