While putting a Shield counter on another creature is a recent innovation from Streets of New Capenna that the blue, green, and white Brokers faction specialized in, giving creatures Hexproof and other protective abilities is something Simic does very well
Signal interference (resonance-based): Some designs interfere with the readers field, making it difficult for nearby cards to be energized and read
While your initial reaction might not be wow, thats amazing, you can use this on opposing permanents too, like Planeswalkers, for example
4-mana 3/3 flyers haven't done very well lately, they just aren't efficient enough when they don't have an enters trigger -- and this doesn't have one
Mana fixers give us the possibility of playing more cards in the color of the splash, and even more colors as a splash