A few things.
In the first mod
style: "', $settings['default_theme_url'], '/css/', $context['theme_variant_url'], 'jquery.sceditor.elk', $context['theme_variant'], '.css",
Why use $settings['default_theme_url']? Shouldn't you just use $context['theme_url'] so that themes other than the default can load their own styling?
And on the buttons mod, if you're dropping the disable wysiwyg won't you always have the removeformat and source buttons? There's no reason to have them done separately now.
Also, please put the remove format with the array('font', 'size', 'color') like array('font', 'size', 'color','removeformat')
It's really designed to go with those three buttons. It's job is to turn those settings off. See the example running on the sceditor site.