You have an issue you would like to see addressed in SharePoint - either on-premise or in SharePoint Online?
The SharePoint product group is listening to your suggestions! In order to pass your suggestion to the product group just enter it on SharePoint Uservoice. Here you as user can also review suggestions from other customers and you can help to promote ideas by voting on them - other customers can also vote on your suggestions.
The SharePoint product group is constantly reviewing the feedback given on UserVoice to see how you as customers are using SharePoint and which roadblocks you are hitting and they use this feedback in future planning of the product to ensure that these roadblocks are removed wherever possible.
Here is the link to the SharePoint uservoice forum: http://sharepoint.uservoice.com/