I "kind of" agree; if anything else, it should be done with some consistence. Not because of the Batman thing, that was nitpick. When post-crisis ended, Bruce was a little over 35 and Dick was 27. Totally workable. But stuff like Billy Batson, who had the age of the youngest Titans, no matter which line-up, or Animal Man's kids, who never aged despite everyone else, were complicated.
That sort of continuity ****-up happens regardless of generational heroes or time-passage by whatever rule, though. There are stuff like that in the New 52, and it's only 3 and a half years old.