The flexibility is what makes it a great card that has stood the test of time. He's not the best counterspell or bounce spell at 4 mana, but the fact that it can shift in its role dependent on your needs is massive.
As
@Nanonox mentioned there are multiple options to maximize it depending on the matchup and board-state. Scary card that could warp the game around itself? Push it back a turn on the stack. Problematic creature on board dominating combat? Bounce it back and buy yourself a turn to draw into a removal spell. Far ahead and want to lock down the game? There are very few tempo plays that are as exhilarating as an EOT Venser into a blink effect to perform a
Plow Under impression setting your opponent back two land drops.
I've loved playing in U/W or Bant blink decks or U/R tempo decks over the years and it has always performed. The body is a relic of the time period it was printed, but to me it's a classic blue card doing unique things alongside all-timers like
Fact or Fiction and
Vendilion Clique.