A lot of the FG rewards are insanely good compared to Stormholds current endgame gear. Some of it even 4x better than the current raiding gear. Are we gonna see changes to them on stormhold or is this the final versions? I'm okay with people getting rewards, but 4 times stronger toons running around because they did some heritage quest on another server? Not too sure...
I imagine you'll have to do the HQ on Fallen Gate to be able to claim the upgraded version on Stormhold, same as live servers have to.