I love EOPKG, best package manager out there IMO.
I like the software center, would be a nice addition to be able to see what the installer is doing kinda like pamac has. You can click to see it, or just leave it hidden.
I like to update via CLI. But all of the friends/family who I have that use Solus (which is a ton) I have just use the software center. I made an "update" bash alias that handles flatpak and snap updates for them.