Viz says in 1051: Here under the night blossoms stands a handsome man of 8! Blessed with great dedication and mercy.... and a level of strength that can be forgiven. This is the birth of the man who would later be known around the world ...as the great shogun of wano Kozuki Momonosuke. Sure his strength now doesn't amount to much i agree,and oda highlights his stronger qualities dedication and mercy for now, but that does not mean momo can not be as strong or stronger than oden with everything he has going for him.
1052:Gorosei hype momo tactics calling him shrewd, in the same chapter luffy and zoro talk about his body and yamato says you've got a very sturdy body You'll be the greatest samurai in the nation one day, I'm sure!! to which momo replys well...I'll try
1053,1055: fight with greenbull if anything this shows momo dedication to wanting to protect wano he should have also understood from gb own words that kaido stopped people from coming to wano in order for him to protect wano he must grow as strong and surpass his father there is no other way. The scabbards can not do it...yamato wants to leave at some point possibly.... momo like kaido has to be able to stop people from invading.