Need honest feedback: OneSource Income Tax + 1120/5471

I’m in the middle of working through 1120 and 5471 in OneSource and I’m at that point where I’m thinking: is there a cleaner way to do this or is this just how it is? If you’ve done it before, what challenges come up the most? And what do you wish you knew before your first 5471 in OneSource? Not looking for perfect answers—just real experience so I don’t waste hours solving the wrong problem.