Thanks for the giveaways!
If I was to design a new legendary summoner, it would take advantage of the new abilities, hopefully including some that we don't even know about yet. A dragon summoner with Amplify would be great to let that interact with more cards. Giving all allies Camouflage would essentially be the same as giving the first monster taunt. Also giving everyone on your team Deathblow would be much more helpful than only having it on one monster. I just really want to see those new abilities get spread around some more.