Wait...how the hell can you criticize Barry's costume design when his costume looks almost exactly the same as Wally and Barts'?
Seriously, the only difference between Barry's costume and that of his successors was the belt and the boots lacking those stick thingys.
That's a rather piss poor argument on account that Hal Jordan was the Green Lantern for the Silver Age and whatnot but look at what Geoff Johns has done with the character. He's done a great job bringing him back to the modern era.
And Barry does have chemistry with other characters. He's an important part of the Flash mythos by being the father figure to Wally and grandfather to Bart. They will be heavily affected by his return. Barry was also very close to Zatanna, Hal Jordan, Oliver Queen, and Black Canary. There are going to be characters, particularly the other Flashes, that will be heavily affected by Barry's return.
Seriously, I can't fathom why people can't be open minded about Barry Allen's return? It worked for Hal Jordan, it can work for Barry, especially since Johns in charge of bringing him back. It's not like Wally is going to get completely screwed over.