Hahaha unfortunately I know this all too well. I'm a massive PSO fan that latched onto the global release day one. NGS has been... not so great.
When Frontiers trailers were first dropping I immediately recognized it. Was amazed that Sonic Team just flat out reused NGS assets. I guess that kind of laziness should have been expected. They lifted a bunch of those cyberspace stage layouts from older Sonic titles too.
These seem to be the sacrifices a studio must make if they wish to release an open world title. And to that I say "Why even go open world in the first place?" I'm quite biased though. PSO2 went open world with NGS and it ruined everything. Dynasty Warriors went open world with 9 and it ruined everything. I've noticed a pattern.