To be honest, I kind of like the idea of that choice (of going just for Savage Blade each time for cleave priority). And if you're going for some manner of AoE parity, it would need to be stronger still, and/or truly allow that choice. You could always mess with GLD/PLD internal mechanics as well. I played around with some PLD cleave ideas a while back, listed in the signature if you're interested (toggleable weaponskill cleave on all Sword Oath attacks, and finally settled on Shield Swipe cleave in Shield Oath - see the "3.2 patchnotes I'd like to see" section). So many options for this stuff.
Heck, just imagine if we took GLD's fast-hitting motif and actually made Fast Blade have a shortened weaponskill recast, increased Riot Blade's MP return and either slapped on a debuff-extender (for Heavy, Slows, and/or Paralyze) or a light, short bleed [Goring could then cleave-extend all bleeds you caused in addition to bleeding the main target], and Savage Blade was a 200-potency cleave. Either improve the current mana uses slightly or give us another offensive, possibly AoE, option to spend mana on. Now you'd really have a choice in where to end your combo.As for Bulwark, I feel like this would reduce the gap, which is good, but the same time, we do of course still want it to be noticeable. I'm not sure without trying to create a variety of situations/simulations in my head just what block rate increase, for how long, and how frequently, would feel best, or if it'd be good to steal some ability value off Rampart, etc., to support that. As long as Yoshi keeps to his statement that magic will never be blockable, though, I'd be much less comfortable with the idea of siphoning strength from more reliable and un-niched mitigation tools to support a physical-only one, even if essential to internal mechanics (through blocks).
[Out of curiosity, what are your thoughts on shield balance at the moment, given that Shelltron favors towers, average mitigation favors kites, and if Swipe (if it were both worthwhile and without a CD, such as if it were a 230-potency weaponskill) favors bucklers? Does that basically work already, in your opinion, or should each of those abilities have an internal balance to favor all shield types more equally?]