Your statments are pretty good and well thought out but there are somthings that you left out.
1. Unlike the sith the jedi don't seek total domiantion of the force I.E: they seek the froce to by balenced not bathed in light as a reversal to the sith wishes
2. The path of darkness is a fast one but look at dooku, he was a great jedi and as a sith he was able to take on anikan and obi-wan at the same time and hold his own against yoda. but the moment that anikan even used a bit of rage he was killed. why is this? simple because the sith teaching can only take you so far. anikan was a strong jedi when he fight fought dooku even then he started to tap into his rage. but after 3 more years as a jedi then tapping his rage again he creamed him.meaning the jedi teachings can give you more wile the sith stops at a point, quickly i mite add
3.think back to episode 1 when obi-wan felt some anger then calmed himself, only then was he able to think clearly enough to use qui-gons saber, maul never saw it coming because he was blinded by darkness
and finaly 4. force ghosts. when ever a sith becomes a force ghost they are weak and they can't leave phyical plane, they can ever be destoyed. wile the jedi way may take longer and his harder it is way more efefctive and gives a better result