I really really do not get why some people are so hostile to this simple feature.
But hey, let's look at Obsidian's games record, shall we?
NWN2 - had a walk mode (press a botton while moving, could remap)
Kotor 2 - had a walk mode (press a botton while moving or remap)
Alpha Protocol - had a walk mode (joystick or gamepad required, but point is, even pc port had the option)
Fallout 3 (New Vegas) - had a walk mode
Dungeon Seige III - ?? I do not have the game, and assuming no walk toggle, considering how many complains there were about the horrific pc controls port.
So, now we have Pillars of Eternity. And no walk mode. Vast majority of famous and niche roleplaying games have this feature. For a reason! Many players like it, and use it, otherwise the request for the feature would not pop up constantly.
It's not like we are asking a completely new animation, (it's already in game, already usable by npcs, already implemented as a mod by users with no access to source code). It's a small and imho reasonable feature request by a portion of the fans who bought and enjoy the game as much as their speed-running counterparts, but could enjoy it much more.