I haven't tried it, but it's a thought provoking question. Like, Extra Attack is only worth so much in a vacuum, it has to synergize with other portions of the class kit to really be "worth it". There's a reason they can throw it in to various gish subclasses (like Swords bard or Bladesinger wizard) and it doesn't obviously become broken. Whereas, I think if those subclasses had gotten Sneak Attack progression as a rogue instead, people would have had major issues with them.I do think if you're going to trade in Extra Attack for something, you really need to throw out Fighting Style as well. If I made Paladin a full caster, I'd probably dial back some of the lower level features and spread them across Tier 1 and into Tier 2.
If I replaced Ranger Extra Attack with Sneak Attack, I'd definitely dump fighting style. I feel like something else should be dumped, but I'm not sure what. Maybe the 11th level archetype feature?
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