Error 500 during migration and No email statistics page

Have just migrated to MailPoet 3 and have found a few things that seem a retrograde step within the free version.

My main issues right now are that:

1) after I send an email, I used to check the statistics page for users that didnt read the post and to get a nice summary pie chart. this option seems to be completely missing in the new version and all I get is the percentage read and clicked on in the listing page.

2) I had an error 500 in the migration wizzard and none of my subscriber lists have been copied over. No idea what this means and where to start looking.

3) image integration is poor now that we have lost the ablity to flow text round pictures. I see others have raised this issue too and I am sorry to see that there are no plans to resolve this.

4) I would like the ability to change the number of columns as we go down the aemail so I can place buttons side by side or two pictures together then return to full width. I cannot see a way to do this at all.

We are a community choir and I use MailPoet to email our members with updates etc. We use our own website to send the emails which go out to around 150 people.

Regards – Bob