They make changes just to make changes.
If it is not broke don't tamper with it. Or don't do it too much.
They should have let the KO as it was. However, I can see the 35 yard line creating more excitement for returns.
Remember the PAT they lined up at the 2 yard line, so a fake was always in play. Then they moved it back so that removed the surprise element. But made games more interesting if that PAT was missed. As opposed to being made 99.9% of the time.
Now the onside kick surprise is gone. So a team now knows, onside kick, or 2 point conversion.
Just another change it will take time to get used to.