Problem: It appears as though the only HTML snippets that still work in ST2 are script_tag and style_tag, since they have an explicit tabTrigger. All others, like html and elementid don't work anymore, despite the fact that as far as I can tell the snippets themselves are unaltered from those in ST1.
Steps to reproduce: Create a blank .html document. Type html and press tab. This produces the word html followed by four spaces (or a tab, depending on your settings) rather than the expected document skeleton.