Like SE said, it is up to you. For what all these are worth, i wil pay for it. Contrary to your preference, i feel all except LED are the reasons to pay the 10k more. Because, OPEL lack online tech support, you can’t retrofit the rest, literally, except LED headlight. You have an option to pay bit more to have a complete car but not my Golf. So i went for the trendline which is barebone, really BARE. Ok because i can add some features with the saving i got from basic trim. I do not need to add everything too like your gamechanging theory.
Personally, i do not like insignia shape, and its drivetrain. But it is a more complete car relative to other options and even those at 200k price level, most if not all of these are not equipped. So you really get a lot for a lot less. Like old saying, you never have it, you never miss it.
Still, up to you.
Maybe you can share what other options are you looking at? If you do not want all these, probably there are other cheaper options unless you want a big car.
Btw, how much is the OMV? Any t&c to get that price?