I double this request - using StickyPassword for about a month I encountered tens of cases when autologin was plainly harmful (especially with logging into bank and e-commerce sites, where I use multiple logins... sometimes disastrous). The most painful (although admittedly not so critical) problem in my case with the login to the sites that get automatically imported from Chrome and to which I use multiple accounts (like: private and business). In such cases I have no control over what login is being used for autologin before it is too late...
Anyway - disabling the feature permanently is something that I look forward to very much. I personally do not mind an extra click.
BTW, thanks for the tip on mass-disabling the auto-login on Windows. This should help (hopefully the updated data will get transferred to my Mac as well