Death summoner is very interesting, can easily imagine him in no melee and no ranged scenarios. Maybe even as generic summoner with weaken/retribution/blast/snipe units, making "AoE" teams.
And for earthquake scenarios entire meta might shift away from dragons, because 2 now summoners grants flying or snare, making it quite easy to form flying + snare comp... So it might be actually good to have first two monsters without flying. And snare + snipe combo must be counted in too during earthquake matches.