Pixel Launcher will soon allow you to choose the default web 'Search engine'.
The app build that comes with Android 14 QPR2 Beta 3 contains a hidden search settings item called "Search Engine". This feature will allow you to choose an app for the web search.
Screenshot from the linked tweet of the setting in Android 14 QP2 Beta 3:
It's lighter as I get to decide what to keep, no loss of functionality as I can still install the Pixel apps from the Play Store if I want to (but with the advantage of added security from GrapheneOS as I can disable their network access among other things), except for Google Pay NFC payments which don't work for now. We have a sticky thread about GrapheneOS if you want to know others' impressions: https://lemmy.world/post/9432155
If there's some security vulnerability, perhaps. That said it's not ingesting data from the web. It's ingesting data from me and some of the installed apps. It's not a huge attack surface. I haven't heard of CVEs for Pixel Launcher for example. Doesn't mean there weren't any. With all that said, I'm using the actively developed version.
Again, there are daily builds that can be downloaded straight from GitHub and installed. That's what I'm running. The only significant downside to it is that new builds don't install over old builds so you have to backup/restore via the launcher's settings.
I only use Lawnchair because of the Arcticons icon pack, it doesn't seem to work with the default trebuchet launcher. At least it didn't last time I checked.
All the other launchers Arcticons supports are either exclusive to the Play Store, or simply not what I like, so Lawnchair it is.