I've used them too, but the fact that they "function" doesn't change the problem. Look at the first five words in the flanking rule. If a table is one that can say they "regularly use miniatures" & wants to add rules to make positioning matter by attaching a bonus/penalty to good & bad positioning, there needs to be more involved than having enough movement to circle around into flanking position, but they removed the shift/5 foot step & nearly everything that can provoke an AoO so a player could literally dash then cunning action dash again to circle a baddie like they were the flash or something without being subjected to an AoO. It takes deliberate effort to miss the mark so badly that they would waste page space that could be used for nearly anything else with a flanking rule that amounts to "you could choose to change the attack roll from 1d20+mods to 2d20k1+mods in nearly all situations if you want"FWIW, we use flanking rules and have no issues with them. I'm just pointing out that if you have issues with it, don't use it. shrug
Anyway, I love how you focused on that after my recent posts. I'll let others continue any discussion with you on this topic. Have a nice day.