1. the priority order of popup hints is customizable in VSCode I believe. Unfortunately, I use sublime so I'm not sure of the exact fix in VS, maybe someone else can chime in with their experience here.

2. I haven't encountered this in SublimeText other than when I first open a large new project for about ~30sec, maybe it's trying to index a large project folder? I know you can set up restrictions on the folders it tries to index to make sure it's not going wild on your whole home folder by accident.

Check out https://www.tabnine.com/faq/#magic_strings and maybe try playing around with some of those config options?