Been thinking of this a lot lately,

This seems to plague most all MMOs. From 3.0 onward, all the content will be stuffed into just 10 levels, but for the original game it is a 50 level spread. Yes, the actual time it takes to go from 50-60 might be equal to or possibly longer than going 1-50, but there will always be much more content at all levels in game from 50 onward to 99 by default. I'd like to see the earlier stuff buffed up, but it might be too low on the development priority list.