More damage is always yummy, and it doesn't seem like only 5% to me, though sure it's not like double damage either.
Also...an attack animation only takes as long as you let it. Using other skills than your basic animation for example...you can wait until its animation finishes, or you can initiate the next attack right after, so sometimes the animation wouldn't even show. It's like...only you control how fast you attack, and how long your animations take.
Always depends on the situation, too. Sometimes it would be wiser to save up some stamina, sometimes ya can just poke like crazy. Speed surge helps, too. I kinda like it how 'haste' isn't required as such, you can mostly control your 'haste' yourself. Of course there's ways to simulate the effect of 'haste', but it's still you deciding on the pace of a battle.
FFXI: Rynaria - Mithra on Kujata [retired]
FFXIV: Fancia Dragonkeeper - Miqo'te on Besaid