In that case, divide the table for sure. It makes it so that you only need half the amount of XP for each level up.
It is also another type of DC4 fix too. Some of the DC4 fixes out there don't actually work. If you're on an admin client+account, you're fine, but with those broken dc4 fixes, you'll start reconnecting instead. Dividing the XP table in half will reinforce protection against dc4 =P