A thing or two about Werlyt

[Cilia]

Actually if you look into it, he sent a small team for a precision strike.... the civilian ppl barely even realized there was an attack lol
-He couldve burned half the city down and then attack, yet he didnt. Heck for all we know if someone else made the strike there might not even be that many deaths...

If you're talking about Ala Mhigo, it was not a small attack. While we don't have a firsthand account to go off, it was so bad it soured Cid's relationship with Gaius and was a major motivating factor in his defection.

In regards to the Waking Sands incident, the fact nobody in Vesper Bay was aware the place had been attacked was a plot point. The only people that should have been able to get into the Waking Sands were Scions, who were a much smaller underground group at the time. Thus it is heavily implied that Lahabrea (possessing Thancred) simply teleported Livia's strike force in and out to avoid suspicion.