I cannot fathom Sonic the Fighters being considered to have more integrity than the other spinoffs when there's an extra chaos emerald and a second death egg that never get brought up again. Those two story details alone should set off alarm bells. Literally any other spinoff you can think of in the history of sonic is more mindful of the games short of the ones that take place in an AU like Boom. This really feels like another situation where Sonic fans pick and choose based on what they like. You can't assert subjective conclusions about Amy's character and your own headcanons in a debate.