I was hoping the XP tables would make more sense in the final rules versus the playtest, but they still seem wonky. It takes more to get from level 9 to 10 than to get from 10 to 11, which could make sense since its a shift in "tier", but then 12-13 and 13-14 require the same? Very odd.
I have no confirmation on the topic as of yet, but I believe the level advancement chart is entirely set up to give the "bigger" levels a different weight than the "normal" levels, with "bigger" refering to levels at which at least some of the classes gain particularly potent abilities.
If I remember correctly 5e (everyone) 20th level = 1e (Fighter) 8th level.
Kids these days... 
I'd also be very surprised if they don't have alternate exp tracks in the DMG. Probably a fast, normal, slow option, or something similar.
Goober4473 wrote: