I feel the same way, because I really liked Handsontable.

Sensei Grid will be kept simple, but additional functionality will be provided through plugins. I don't want to flood the core grid with functionality that would lead to complexity. However smart pasting is something I would consider including in the core.

Btw I just updated README.me file and added goals, blog posts and other info related to Sensei Grid - https://github.com/datazenit/sensei-grid/blob/master/README....