When was the last time you saw a vanilla creature (a creature with no rules text) in a new set, or even a French vanilla one (no rules text except keywords, like flying)
There isn't a lot better going on in Standard than The Eternal Wanderer resetting Beza, the Bounding Spring every turn with a Caretaker's Talent on the battlefield
Because of that, Lotus Bloom is probably the most important card in your deck
There might not even be anything weak about the commander itself
In general, Thalia, Guardian of Thraben is the better of the two since it comes down a turn earlier, but there is some upside (outside of budget) to playing a split of both since Thalia is legendary, so while we can never have two copies of Thalia, Guardian of Thraben on the battlefield, we can have one Thalia and one Vryn Wingmare