just thought i'd post in here as well, my partner and i both have outriders token and shield of hammerhand. we,as many others, preordered the HD edition with the shield to lvl low lvl alts quickly as it originally worked with the outriders token. long and short we both filed in game reports and both times the GM said 'this is not a bug and both are WAI' and they are not supposed to be stackable (we even mentioned that before they DID stack) but to no avail.
to me it seems Turbine would like none of us to notice they did a bait and switch sneaky on us by changing the icons under char portrait (you'll still have 2 bonus icons there but they're both from the Shield) whereas before we had 2 (+25%xp) bonus icons one for the Outrider and one for Shield.
A simple blue name response here that this is in fact NOT WAI as it stinks of false advertising and will be fixed would be nice.