5 Reasons Huatli, Radiant Champion Will Not See Competitive Standard Play
#1- Huatli doesn't protect herself well
What is the hallmark of a great walker? #1, it has to be able to protect itself. That's a pretty broad requirement. Afterall, there are many ways a Planeswalker can use an ability to prevent itself from being dealt lethal damage. Gideon of the Trials can stop damage from one permanent for a turn, Gideon, Ally of Zendikar can create tokens that can chump block, Liliana of the Veil can make an opponent sacrifice a creature, Liliana, the Last Hope can shrink a creature. If you look at almost every great Planeswalker, they interact with opponent's creatures in a way to prevent themselves from being killed in combat next turn (provided all else being equal). There are a few exceptions to this rule. For example, Saheeli Rai was played despite having no good way to protect itself. But Saheeli was part of an instant win combo. There are not many walkers that can provide a win using a non-ultimate ability.
Yes, Huatli does have some protection in the fact that her +1 loyalty ability will give her more loyalty. However, with no creatures, the +1 only gives you +1 loyalty. That's not good at all.