There's a mod for toggle mouse look, definitely want to use that. Sprinting is retarded and whoever thought it was a good idea is also a retard. Sprint should only work in combat and ooc speed should be maxed all the time. And yeah it is pretty spammy, as is customary for mmos really, other than FFXIV and its 2.5s GCD(which was still spammy, but just slower spam) every mmo released after wow has been spammy and wow itself is spammy. The thing though is you're moving ALL the time on top of the spam, so that adds quite a lot of keypresses. In wow while there were plenty of fights that required mobility, a lot of the time you'd have lulls for 15-20secs of stand still and DPS kind of shit with movement being random targetted abilities "gtfo the raid or wipe" type of shit. I think that's what makes it look more spammy than it is.
If you stand still and just DPS, you'll notice it's actually not very intensive, at least if you don't compare to EQ. But since everything spams telegraphs at you all the time, you have to move all the time, which means for every ability you press, you're also pressing 1-2movement keys. And holding your right mouse button to adjust your direction while doing so.