It’s a shame you didn’t contact me about your problems. There are several plugins that are known to add conflicting javascript that causes problems with WP Super Edit. I also did not test with the Chrome browser yet, but I would have loved a report.
As far as I know, the documentation is very clear about what WP Super Edit does and why.
There are some things that I have not purposely added to the editor such as font sizes and font typefaces. I probably will now, but I personally believe in the more cohesive CSS approach to web design instead of cluttering up content with font tags and lengthy style attributes. I will make sure they get added to my next release.
As you may already know, more advanced WordPress users will write HTML by hand using the HTML Tab in the editor. I do not pretend that my plugin will do everything conceivable to make your HTML editing better, so sometimes you have to work with the HTML and javascript languages directly to do advanced things. WP Super Edit does add some nice things to make this easier, but I do not pretend that it will solve everything.
Your review does confuse me a bit, and makes me sad that I get poor marks for taking work needed by my clients and users and making available to you for free. I can understand it when I make a mistake, but here I am sensing that either I didn’t properly communicate the purpose of this plugin, or you don’t seem to understand the concepts of HTML editing using a tool such as TinyMCE. Ajax is a programming concept, not a cure-all. It is also very hard to increase performance as you add functionality.
WordPress users and technical users by nature are a fickle bunch, and I’ve been doing this for 13 years, so I’ve met all types. Your rather harsh criticism is nothing I haven’t heard before. I’m really sorry I couldn’t help you. Feel free to report bugs and make feature requests. Heck, if you feel I can add something to improve the experience, download some source code, make some improvements. I am always looking for ways to improve this plugin.