Why are there still so many issues from FH4 present in FH5?

Honestly, I was expecting most if not all of these things to be gone by now, but no? It’s understandable that perhaps it wouldn’t be patched out of FH4, but this is a new game, come on guys.
For reference, I’m talking about:
Double dialogue
Red speed lines on basically a straight road
Not being able to see my speedometer/revometer in the first few seconds of a race because of the “Go!” text
Drift zones being the wonkiest thing on the planet
I’m sure there’s a bunch more I’m forgetting, but bugs or ‘unintended features’ like these should have been left in FH4. Makes the polish of FH5 seem to go down tremendously in comparison which adds to the base lack of polish the game has.