I am not really good at explaining stuff, so this might not sound right.

On the "Account" page it could measure the rate your getting exp and take a approximate guess to how long it will take to level. 

Say you need 100 exp to level

You gain about 5 exp a day, it says. "Days to level: Approx; 20 Days"

But if you miss a day on pb it says. "Days to level: Approx; 21 Days"

Sounds like a good idea....I wonder what formula would be good for that....maybe a last 7 days count?

There are way too many variables for something like this. Most users would use this as a promise to level in X days. Then we'd see support emails to the tune of "It said I'd level in 5 days yesterday, and now it ways 6 days. What gives? "

i could power train for a year and i wouldnt level, but i could mug for a week or 2 and level...its all about what your doing thats giving exp

there are way to many variables like tommy said for this to even be close to working

and why does the staff need to do anything? if your getting 5% exp a day, i think most people could do the math and figure out how long it would take to level on their own calculations if they are that concerned