also forgot that Palmon and Tentomon had their shine in the other cyber sleuth games, so for the less recognized of the 8 it was either Gomamon or Biyomon, and im sure in the next Digimon Story game Biyomon will have its time to shine as well

I know that, and thats why i think it gives him another chance to shine alongside Patamon and Demidevimon, its better for him to be a starter here than it being Agumon being shoved onto us for the 50th time, also trust me Gomamon is not the weakest designed out of the 8 *cough*biyomon*cough*

its because he is a silly little seal guy, and he is way more popular than you think, he is one of the original 8 of adventure, more popular then demidevimon for sure, and he evolves into digimon Thor

It is time for me, random gomamon fan on the internet to explain it to you, gomamon is there because the 3 starters are suposed to represent the olympus gods
Patamon:Zeus
Picodevimon:Hades
Gomamon:Neptune
( The new game will have lots to do with the digimon version of those gods)