Generally speaking I love to finally have a VSCode plugin but it seems as if (at least for me) there a quite a few problems mostly related to the language server.
I mostly use the plugin to edit and compile PL/SQL code and the biggest problem is the overall performance and sluggishness of syntax highlighting in the editor especially in larger (> 1000 lines) files. When an error is detected and shown with squiggly lines It the CPU is at 100% with a Java process and it sometimes takes minutes until the squiggly line stops dancing around in the editor.
Quite often the editor also simply shows a squiggly line although there is no syntax error and only making additional changes or reloading the window makes the error go away.