She was always able to assume the form of Zandilar, she never stop being Zandilar as well, as worshipped by the Elves.
It could be argued the MTOFs really only touched on Zandilar's pre Shares past, not her present, and even the Sharess form really only applies to FR, on other worlds Zandilar and Bast and Felidae are seperate Gods.
Tyr, because he wasstoleninspired by the Norse pantheon. Gotta support my ancestors!
Ed Greenwood?He actually is from the Norse pantheon, plenty of interlopers have come to Toril and he's one of them (this could be a retcon added in 2e or the FR creator, whose name I've forgotten, might have mentioned this even earlier).
Ed Greenwood?
My re-write of the silly "divine soap opera love triangle" leading up to 4e Spellplague in Grand History of the Realms revolved around Tyr receiving a Certain Summons instead. He makes arrangements in Toril with Torm, Helm, and Ilmater, gathers his host about him (plus some human volunteers who do NOT appear in the Norse myths and therefore might change prophecy and fate) and departs in glory, headed for Odin and Asgard and Ragnarok.