As far as the topic itself is concerned, I can't be the only one who finds the idea farcical. There is nothing to substantiate that any of the characters mentioned in the OP were well received in their respective "times to shine" specifically because they were introduced in some capacity years in advance.

Yugiri and the WoDs in particular are directly connected to two characters who don't have this alleged benefit, yet are every bit as popular as the ones who preceded them: Hien and Cylva. The latter's case is especially noteworthy because she's introduced as the heretofore unseen sixth member of a five man party, yet is arguably more beloved than half of the Warriors of Darkness. And Krile? You could axe every single mention of her prior to her first appearance in 3.1, and absolutely nothing would change about her popularity or reception. Krile isn't remembered fondly because of that linkpearl call Minfilia had with her in the background of one of Alphinaud's speeches. She's remembered fondly for who she is and what she does onscreen.

And what's "where others did not" even supposed to mean? Because with words like that in the title, it sounds like the intent behind this thread isn't to extol the virtues of how Erenville was written, but to cast shade on whatever "others" are being implied. Hells, it even casts shade on Erenville himself.

And as far as Erenville himself is concerned: I'll confess that, aside from finding him to be very physically attractive and enjoying the sound of his voice, I didn't really care about him until Dawntrail took him from a one-off friendly face and made him into a well-rounded character with a dynamic arc, interesting and fleshed out background, and role as the comically serious foil to his childhood friend. Which is, imo, precisely the opposite of what's being suggested in the OP: That his character was only well received because he'd had years to simmer in the fans' minds beforehand.