I think the annoyance with the launcher is directly linked to the type of game you're logging into, XI is a slow paced and somewhat clunky game. So having a 30 second secure launcher where you have to click a few buttons seems kind of minimal to me. You're gonna be doing stuff when you login anyway.
If it was Overwatch or something, then it would be a much bigger deal to have a slow launcher.
I also don't see the Hz launcher as being some kind of big deal either, a) it's installing way less data so it's faster for that reason b) it's less secure and c) when you login you're gonna be lfg or traveling for 3 hours anyway.
Having a fast launcher for XI is like driving a ferrari to get to the park to play chess.