We've been over this earlier in the thread, but, alright, here I'll go it again.
Drow are a 28 point build and if you max your charisma there are only enough remaining build points to take constitution to 14; that is 4 constitution behind a human and 6 behind a warforged. If drow were 32s, a: drow would be good for more things.
If you do the math, Drow are 32 point builds. That's the whole point. The difference is you don't decide where to put the extra 4 points, 2 go to Int and 2 go to Cha.
I do, however, agree that you need a plan to help make up for the lower constitution.
Proud Officer of the Guild of the Black Dragon on Sarlona.