What are the general and individual shortcomings of the northern and southern societies of the Decembrists?

Common disadvantages

1) both did not try to use the common people to overthrow the autocracy, they simply did not see any strength in the peasants.

Disadvantages of the southern

1) only the military were accepted into the ranks of the southern Decembrists.

2) They negotiated with the Polish Patriotic Society, which would receive part of the territories of the Russian Empire for its help.

disadvantages of northern

1) The northern Decembrists had an internal split, they were divided into two camps,
some supported the Constitution of N.M. Muravyov. Which would create a Russian Federation of 15 powers, he also wanted to divide the peasants from the communities and distribute large land plots not to communities, but to families.

And PI Pestel wanted to create a Republic with a strong central government, he also did not want to divide the peasant communities.