Eh, true enough, I suppose. But with Reaping Knives and Time Parasite that's an end game build. Hardly representative of Focus-reaping capability trough the game. Which isn't bad, mind (provided that your're not targeting an extreme Deflection enemy, like a dragon). But insufficient to spam high-cost spells.
Before you get to "end-game" you also don't really chain cast with your wizard, since you lack sufficient spell slots. My personal take is that the cipher (relative) power drops a lot mid-game - early game you have the advantage of spamming level 1-2-3 powers far above what other casters can (they are rest gated), late game you are evenish with both chain casting. Mid-game you don't have reaping knives and wizards/priests/druids start having enough spell slots to spam.
Quartic (Cipher) vs Quadratic (Wiz) power curves, if you will. The bump/lull part.
So potent, but not really versatile. And lacking in speed without consumables (which I personally use very sparsely).
Druid CC spells mostly target reflex/fortitude, Cipher CC spells target will/fortitude, while Wizards target all 3, they got the coolest new goodies from White March. Like you said, wizards are def. the most versatile, but thankfully most of the time only 1 defense is significantly different from the other two in value, higher or lower, so it's rarely a functional advantage.
I also don't like crafting or consumables, or resting for that matter, which is probably why I value Ciphers comparably to Vancians. Rest spammer likely consider them thrash.
I think the combat is too fast, all the attack speed buffs don't help. It feels like a hack and slash, but with 6 characters. The druid lacking in speed, and it being a bad thing, is a testament to how speed-heavy the combat is.
It's not overall combat speed, but Wizards and Ciphers have a native +50% attack speed spell/power, while druid has a 25% (I think) on a super clunky Nature's Bounty, which is a huge advantage with how recovery works (invalidates individual spell benefits), and why it makes sense when comparing chain-casting to assume Druids use DAoM pots.
I like PoE overall speed, but don't mind them making it slower in Deadfire as long as they enable Speed Mode to be activated in combat.