One of the more unfortunate blemishes that I see on ESO's beautiful combat system is the timer-based buff system that can sometimes make players feel more like they are maintaining their character's power instead of consciously playing as a powerful character.
While the practice of buffing a character is that you are making the character stronger than they normally are (a bonus that should require effort or conscious planning), it would be great if ZOS looked further into the implementation of buffs and buff-like skills to provide players with more options that feel less like maintenance, and more like organic (yet, still conscious), in-the-flow-of-combat buffs. There are already some stellar examples of organic feeling buffs that already exist in-game:
1) Passive buffs that permanently apply when a skill is slotted (ex: The Dragonknight skill Flames of Oblivion gives Major Savagery and Major Prophecy for being slotted).
2) Passive buffs that apply whenever any skill from a skill line is activated (ex: The Nightblade passive Shadow Barrier gives Major Ward and Major Resolve whenever any shadow skill is activated).
Another, more recent example of an organic-appearing buff was giving Templars the Minor Protection buff in their Spear Wall passive -- it was a change that gives the player options from an entire skill line to activate the buff -- meaning they could pick whichever skill felt best for them and their build. Implementing more buffs like these may help to reduce the "buff bar" mentality of maintaining a character and/or utilizing one of the two weapon bars for the purpose of buffs.
Another option that would be great for players to have is to allow applicable skills to be toggled. Skills like the Warden's Lotus Flower or the Nightblade's Siphoning Strikes are good candidates for buff-like skills that a player may wish to toggle -- effectively allowing the player to never have to cast the skill again at the cost of occupying two slots (bar swap) to remain active, if they choose to make that sacrifice. Toggling a skill could be as simple as pressing the "lock" button on a skill (like we currently do to lock items that we don't want to sell or destroy).
TL:DR - Please consider how buffs can fit more organically into a player's rotation (like you did with Templar's Spear Wall passive) so that utilizing buffs feels more like consciously playing a powerful character, and less like maintaining a character's power.