Yeah, they brought more of the prog on the next two albums, but the Flying Colors debut album was definitely meant to be more in the poppy/catchy direction with not much emphasis on the prog. Infinite Fire definitely is a killer song, though!
Looks like much of the fanbase has a similar feel for Sola Gratia that I do: it's good, but not great, and too much "more of the same" from Neal. I do think songs like Overflow, Never Change and Seemingly Sincere are all a bit different for Neal, and not coincidentally those feel the standouts.