The Summoner needs more busrts abilities to get out of the plateau. I hope in the expansion Summoner get a bursts phase by transforming into the Primals by using their body as the vessel for the Egis. The lore of the Summoner is the longer a Summoner horn is the more knowledge, power and aether a Summoner has. Since the Summoner horn is longer in 3.0 we can absorb more Aether meaning summons should have more abilities and be more powerful because we can draw more upon the essence of the Primal and have better control in manipulating the Primal Essence.