Right I agree, I did take into account things like difficulty and screen position but for some characters it definitely was a problem. Also I'm pretty sure at the moment there are no combos that say you should have x amount of meter and y combo will build exactly enough to do z.
IIRC K' had about 6 or 7 combos for 1 super 1 drive. It's K' so those combos all work anywhere and are about the same difficulty. The problem is a lot of stuff on the wiki hasn't been looked over in a while so some of it many be dated, especially the optimal combos.
There are a lot of resources out there for cool and flashy combos but in my opinion, a gameplay wiki should include the most damage for that amount of meter. However if a combo is really difficult such as K's dp+A (DC) qcf+C then there should be some variations that use the same meter and deal just a bit less damage.
That's the approach I took when I edited the pages.