If Chao wasn't broken then mc would be average to skilledIn fact, it would make a difference. Although Wu Chao would still be defenseless against someone of TY or DQ's level, the Wu Clan's situation would be completely different.
He would raise the status of the Wu Clan. If Wu Chao was between Bohai and DQ, he would probably be on the level of figures like Patriarch Yang or Patriarch Su. This would place the Wu Clan just below the Tang, Yang and Su Clans, making it much richer, more reliable and more influential.
Therefore, the MC would have grown up with better resources. Tang Ruo (the "greatest genius in history",) himself, recognized that the main difference between him and the MC was resources.
MC's performance reinforces this impact. The MC grew up in a situation only slightly better than that of a poor minor clan, but even so, at the same stage and age, he was practically invincible. In the first half of the game (before the coma), MC defeated all opponents his age (except Ruo).
Even now, whem almost all opponents of the same level are older, MC has yet to lose a one-on-one fight.
So Wu Chao continuing to progress wouldn't make him a monster like TY or DQ, but the impact it would have on the Wu Clan and on MC himself would be great.
He'd be at mei's brothers level