There is no reason we can't play similarly fast.
We won't have a super-confident (mindsets, can be learned), shooting, speed merchant, below average defending PG anymore.
But the expectation should be that we can make up for what Denis does, most of the time, with an improved (Jake), Curt, Dom, Jamar, Wally, and Rodney.
The only negative I see is Freddy slowing us down.