What is the minimum Deposit for bets?
There isnt a minimum deposit on stake.
There is neither a min. bet amount on stake.
So as you long you send an amount high enough to cover the transaction fees of the network youre good to go.
In the casino there's not much limits other than the profits but on their sportsbook there's a small minimum of 100 satoshi (similar minimums on altcoins) on most markets.
On top of this, their UI is very laggy and I haven't seen any improvement in this area.
I agree that the UI is less responsive but it's not much of an issue unless you mostly place your bets on their live odds together with the cashout.