While I love DoT gameplay, I think it would be better with a multiple DoT style, and it’s extremely unlikely that Yoshi P. would go back to that…

I think what Summoner needs is to actually summon things; the execution is the issue. We need control over which summon we get (perhaps a wheel system, or input similar to Ninja or Dancer). Example: the situation calls for a bit of extra healing - wheel Phoenix, granting the Summoner the AoE HoT. Need BIG AoE damage? Bahamut: player gets to deathflare. Single target? Odin, giving the summoner HARD hitting attacks with zantetsuken, etc. Between these big phases, give us six choices from the original primals: Ifrit, Garuda, Titan, Ramuh, Shiva, and Leviathan. Those should have their own rotation style, and bring something small in addition, requiring some thought on the part of the player. Perhaps Garuda improves skill/spell speed for 20 seconds; Ramuh might increase target’s magic damage taken, etc. Another option: big summon phases actually call down the primal, whereas in-between phases are treated as Evoker-style, with the summoner taking on aspects of the primals.

The job still needs to summon things in an epic way; the changes need to simply add rotation complexity and DEFINITELY increase the power level of the job.