Sure, Cisco gave him a white chest emblem after the events of the first season, but beyond that the texture and aesthetic of his suit have remained relatively consistent.
Grammatical errors aside, Grant Gustin’s tweet definitely makes a point.
Unlike most major superheroes in the Arrow-verse, Barry Allen hasn’t really made any significant upgrades to his outfit since he became the Scarlet Speedster.
The actor appears to recognize that he’s in a bit of a rut, and this tweet seems like confirmation that we will see a change at some point in the very near future.