FF Tactics is probably my favorite video game, and certainly by far my most replayed. I'm also quite fond of the WOLK script, though at times I did feel it was a bit too ornate -- I like FF12's 'balance' (or moderation) of Elizabethan influence a bit more. That said, it's quite enjoyable to read through WOTL nonetheless for me.
That said, I do think it's a fair criticism to go after it as.... unnecessary? Pretentious is a little rude and assuming, I think, but still, I do think it's at least fair to debate it simply because it's not the original script. To my knowledge, the original Japanese script was in no where meant to take influence from Elizabethan area, nor obviously was the original translation. So, in the sense that it's not how the game was originally designed or envisioned to be, I do think it's fair to question whether it was necessary to add it after the fact, and to what purpose does it serve.
If the original writer and designer had come out and said that this is his director's cut, for example... this is how he originally envisioned Ivalice, then that's one thing. But when it's after the fact so much, with the game already having established Japanese and English original translation, and it's a rather distinct third-party (to the original designers) making this decision, I don't think it's unfair to debate their intention.
Again, pretentious is a bit insulting or assuming, I think, but there could be an argument for it being unnecessary -- I don't agree myself but I'd at least listen to the argument.
I like the decision, personally, because I've played the game over 15 times so for me the variety is fun and refreshing lol. But if I were to recommend the game to someone for the first time, I may recommend the original script just because maybe that's the one that better captures the original version of the game -- that's the one the designers signed off on. The new one to me is more of a wonderful, but alternative, script.
I do think it was was necessary, welcomed, and certainly not pretentious (unless we're now shaming any sort of dialect other than modern English). But I would at least say I'm open to debating whether it was necessary simply because, unlike FF12 at least, it was done after the fact -- there is 'after the fact' motivation to consider and whether that new motivation genuinely serves the original designer's vision or not.