On O’Meara it was barely even a free kick.
there was no slinging motion.
thought it was holding the ball myself
This is the perfect example of what has now become a major problem ... the tackled player slinging themselves to the ground to get a free kick.
Before this rule was introduced, how many times can you think of a player legitimately being slam tackled in a dangerous fashion? Be lucky to see it several times a year. I don't believe the tackling has changed all that much. It's mostly players absolving themselves of responsibility to protect themselves, or throwing themselves to the ground, just like they do with push in the backs. But it is much harder to judge the flopping on these dangerous tackles.
Don't know what to do about it though. I'd personally just abolish the rule completely, and then if there are any egregious ones then punish at MRP stage.