My Findings while migrating SharePoint 2010 to SharePoint 2013

I am in process of migrating SharePoint 2010 to SharePoint 13, here are some of my findings till date:

Please note i have not migrated using content DB attach detach, i am taking STP's or trying to implement same css, scripts in 2013 environment.

Working Perfectly:

1. My sandbox solution is working as expected after starting the sandbox services
2. Silverlignt webpart working as expected 
3. Most of the infopath is working, one issue i noted till date is mentioned below
4. 
   

Not working as expected:

1. Infopath 
1. GetUserProfileByName webservice is not working due to claims based, working on it to fix it.
2. CSS
1. #RibbonContainer-TabRowLeft changed to #RibbonContainer-TabRowRight
2.  #s4-leftpanel  changed to #sideNavBox  and  .s4-ca changed to #contentBox
3. Some new CSS i mentioned in my post
3. Minimal Download Strategy- Facing issues if this feature is enabled
1. Page is redirecting with _layouts/15/start.aspx#
2. Connect to outlook greyed out
3. Quick edit greyed out
4. Error when Modifying a View on a List
5. Error when Creating pages, lists, error "cannot complete this action"