Since we've had Claude Code for a few months I think our opinions have shifted in the opposite direction. I believe my preference for autocomplete was driven by the weaknesses of Chat/Agent Mode + Claude Sonnet 3.5 at the time, rather than the strengths of autocomplete itself.
At this point, I write the code myself without any autocomplete. When I want the help, Claude Code is open in a terminal to lend a hand. As you mentioned, autocomplete has this weird effect where instead of considering the code, you're sort of subconsciously trying to figure out what the LLM is trying to tell you with its suggestions, which is usually a waste of time.