Nichegamer wrote up some hands-ons of Fate/Extella and Summon Night 6 from E3. They're both pretty interesting, and I'm definitely getting Summon Night 6 when it comes out:
http://nichegamer.com/2016/06/15/fateextella-hands-preview-fate-found-new-home/
http://nichegamer.com/2016/06/15/summon-night-6-hands-on-preview-summoning-for-the-win/