It's not even hard to bring Frieza in, and do it right. First step is literally yeeting the entire golden Frieza saga out of existence. Lizard gets revived post-Beerus saga like in the original, but that's it. Unlike in that, he keeps his head down to train and plan for the future, rather than rush in like a retard after he got some bling. Golden Frieza won't get revealed until the TOP saga, and it will involve God Ki to achieve. Toriyama may not use the concept he came up with there(wouldn't be the first time) but I sure as shit will.At this point it's a bit impossible to change that, it's too baked into the code of DBS sadly.