That is not true. They're not coming from ROH, they're coming from the second most popular promotion in the United States. Samoa Joe and AJ Styles would both debut in the upper-midcard, and it's possible one or both of them could debut in the main event. Christian left the WWE as a midcard heel and came back as the face of a TV show. Whether you like what they did with Christian, it showed how much they respect TNA. After multiple years away from the WWE, he got a good pop for a return. I think you're really trying to downplay TNA's popularity.
AJ Styles starts at 86, and Kofi Kingston at 83. Your suggestion to drop the overness rating by 10 would put AJ Styles well below Kofi Kingston, and that is not realistic. If you don't like how it turns out in your game, I think the most fair thing to do would be to change it yourself, and not suggest everyone takes on this injustice.
And sorry to break it to you, if Hogan showed up at Raw, he would have as big a reaction as anyone. Period.