I am going to be making a giant MVCI guide/primer for new players soon on a Google document. There are 0 resources for the game right now, all the information is scattered and information is always bring dolled out in relative terms to previous MVC games which makes things confusing for new players.
I will also be linking combos and other guides in that document for characters if I can find any.
Like I see people asking for questions and while I have some answers, I think it's better to actually have a resource that can be updated.
So I will be attempting to explain stuff like synergy, point vs support and team structure/examples.
I have a mechanics guide up already that is in the OP. Most of the information in it is still valid but I will be updating that too.