So if you just go by ratios, I think there is nothing to worry about.
1-100 takes let’s just say 3 days to a week, depending on your level of commitment. That doesn’t mean 100-200 is going to be the same. Maybe that takes roughly twice as long, could even be 3 times as long.
That 500-600 though…Think about it folks. Games with super high levels rarely scale slowly after you get up into that range. Plus, with all those levels, that leaves room for a whole lot of content after 200. Not to mention I think most people will want to make an alt/have another class character. If you max out one character, you’ve still not experienced a whole lot of the game in terms of playstyle choices that it offers, y’know? Tired of being a Highlander? Try out being a Quarrel Shooter. Or something like that. I just picked random classes but the point stands.
So yeah, don’t feel bad about 1-100 being a little fast. If you check the ratio you really haven’t accomplished all that much in relation to how high you can go.