All right. So I've finished the book twice, made nice notes. And here's a tl;dr list of Suvorov arguments. Their order is mine.
1. Change in military doctrine: from "defense in depth" to "deep operation" or "Soviet Deep Battle".
2. Military buildup - the creation of the First and Second Strategic Echelons.
3. Composition of the First and Second Strategic Echelon.
4. The offensive nature of military equipment.
5. Preparation for the sovietization of occupied territories.
6. The offensive mentality in training of the armed forces.
7. The relation between placement, composition of the units and the new doctrine.
8. Unusual tidbits - just evaluate them from an offensive point of view, they will make sense.
9. Obsolescence - certain equipment and formations became obsolete with the start of Barbarossa.
10. Only offensive plans were made.
11. The impossibility of keeping this force together for a longer period of time.
12. They know the Germans will attack but they thought later.
13. "Warnings" (of Churchill and Sorge's) were useless.
14. Motivation - the ideology behind the planned offense, the world revolution, long term planning.

Except for the last four I have a few short paragraphs written for each. I just wanted to load up something because I promised to do so this week. These lines above first meant to be as titles so some I had to change and may not be the best. In the next few days I want to give the short versions of them too, I hope that will make it clearer.