How true is this opinion regarding the games before Sky?
This is what people don't understand, the people who made the fantastic Sky trilogy are gone, Falcom as a company is a hollow shell of what it once was, and you're not really playing a true continuation of what got people interested in the series to begin with, just the dregs left aping what came before them as the series and characters degrade further and further with every installation. For fucks sake look at the tech progression in the series, we went from the Industrial Revolution in Sky to basically modern day Japan by Cold Steel, complete with cell phones and internet access. It's mind boggling how badly they fucked it all up.
I don't think Sky is fantastic. The first game is overall good but still has pacing problems (first 20 hours are boring and it's a 40 hour long game), writing problems (fakeout deaths, the antagonist is objectively and morally right on all counts and the protagonists have no valid motivations to oppose him). The second game is where all of the problems common to all Trails games begin (filler chapters about chasing after Ouroboros villains with zero plot progression, mass murderers getting off scott free to continue haunting the series in future installments and general lack of accountability, lack of stakes and consequences). The shitty writing was there from the get go, it's just that it becomes tiresome after 1,000+ hours of it, especially as the storylines set up from the beginning like the looming world war are thrown away, and for many people that's the breaking point when they realize nothing bad will ever happen and they're going to continue chasing Ouroboros in circles for another decade.