As much as I love Caesar, I doubt he would have changed the fundamental structural problems with the Republic. He was a lifelong populare, and his belief in land reform was probably genuine, but the Roman Republic needed a total constitutional overhaul. It just was not a well-functioning entity by that time, and I don’t think Caesar ever expressed interest in that kind of radicalism.

And, I mean, let’s face it, he got stabbed by the conservatives for doing exactly what the ultraconservative Sulla did a generation before (taking dictatorial power without express term limit), only with Caesar forgiving instead of murdering his enemies, and being more poor-friendly - the chance of him getting through something more radical even if that was on his mind was effectively nil.