I am sorry, I know I am not a member staff, but as someone who has tried his hardest to help out with Dragon Ball back in the past, never in a trillion years should this be allowed.
1. Give the more rabid Dragon Ball fans an inch, and they want a mile. They won't be appeased by this, they will just complain and nag and nag and nag on how he should be 2-C and not stuck and low 2-C, or how he should be 2-B because of this, or how he should be 2-A because of this. Appeasment has never worked, EVER.
2. As people noted, some verses need composites (I.E Pokemon, Dragon Quest, Mario, Godzilla) due to a lack of information for one specific game. But not Goku, we might as well have a composite Naruto, composite Ichigo, composite whatever. It is a slipper slope opening the floodgates to "COMPOSITE NARUTO REQUEST" threads.
3. It will just lead to more confusion. You can highlight in neon-letters every other sentence that this is the composite page and that the main page is here, but people will still be confused and accidently use composite goku for matches.
4. It will lead to more stomps and spites against Goku than ever
Seriously, if you want. You can just accept the DBS manga (Which is debatably canon and which AT seems to be more directly working with anyways) to be co-canon with the anime and have all the feats and abilities from the manga/anime in one there. Or you can just make a disambiguum for Goku, but a "Composite Goku... Everything" profile is just a horrendous idea.
Once again, I am sorry for posting on a staff only forum, but this is just too much.