This many extensions in gnome will be fragile. Extensions have a tendency to stop working on gnome updates. The more extensions, the more issues you're gonna have. Though will probably work fine on a stable slow moving distro like debian or something.
Personally I use 3 extensions: dash to dock, app indicators and desktop icons.
The fact that "Dash to Dock" isn't built in because Gnome is going all in on the ridiculous minimalist tablet like interface is seriously one of the things that makes me uninstall it after five minutes every time I've tried to give it a shot.
I'm running a desktop with two 32 inch monitors, not a frickin' tablet. The reason traditional desktop interfaces have survived for so long is because they work, dammit. I shouldn't have to click into an app drawer every time I want to run an often used app just because some developer thinks they should look like a tablet.
I regularly use an 11” laptop and I appreciate how much screen space GNOME allows for my applications. The interface is very keyboard-friendly as well, so launching apps is just one keypress away.