Considering the Era this was built and designed to compete we have to compare it to the Demon Urban Fighting Vehicle and the Goblin Infantry Carrier Vehicle. both were common elements in the SLDFs mechanized infantry forces.
this vehicle carries the same amount of infantry as the Goblin, which is good, and has enhanced capabilities, which is better, at four times the price tag... not so good. the Demon has greater firepower, but carries no infantry or anti infantry gear. as it is meant to support conventional troops in the field this is not seen as a downside.
in the Star League era, this thing would be a non compete for me. it is trying to merge the two above vehicles and largely succeeds, but SHOULD IT? that is the key question. the additional carrying capacity is nice but on the battalion level would be excessive, and not worth the firepower sacrifice of the Demons Gauss Cannon.
As for who this WOULD be suitable for, it would be a house military that was more in the market for one vehicle over two. Autocannon points to an AFFS buyer, though the 60 ton frame and 240 fusion engine make me think of Jalastar Aerospace, NETC, or Bulldog as possible manufacturers. that means AFFS, DCMS, or NETC trying to under the table sales.
points of improvement to make, as you said ditch the flamers, poor synergy choice and a safty hazard for the infantry this vehicle is meant to escort. Machine guns are a better choice. an LB on the turret provides limited anti air firepower and improved anti tank, and since specialized munitions are limited in the era you are not sacrificing versatility...
