As a SMN main since 2.0 and someone whose favorite job in the franchise is Summoner, I've long since given up any thoughts of a massive job overhaul or change, at least for the foreseeable future. I will say that compared to the other jobs in the game, Summoner in general fails to live up to the expectations of the job that fans of the series have come to expect, which is why I see these threads crop up constantly, but people hoping for a massive rework or XI-sized summons are probably only going to be disappointed.
I think things will get better when the Egi Glamour system starts to get expanded and takes off, when we have more than Garuda/Ifrit/Titan and Carbuncle as summons, and gets a bit closer to the job that is capable of summoning the many primals present in the game. My greatest fear for the system: the Carbuncles were just a model swap of the Egis, with the attack animations being the same as the egi they were pasted over. While it is a lot of work, I'm hoping that isn't the case when using a glamour of a primal egi, with their attacks and enkindle animations changing to match the egi glamoured.
Between the egi glamours (and it looks like maybe the appearance of egis are getting improved in SB as well) and hopefully an expansion of DWT abilities in SB, I'm cautiously optimistic that Summoner will slowly get closer and closer to what a lot of people generally expect it to be. I certainly wouldn't mind if the poison-based ACN abilities got animation/name changes when equipping the job stone or if the job was eventually split from ACN/SCH and reworked to some degree, but I'm not holding my breath waiting for such a thing to happen.
While it's not my favorite version of SMN from the franchise, I do enjoy playing the job as it is now, and I think that with the right adjustments and QoL changes, it can be brought closer to the sort of job people expect from SMN without changing how the job works in a major way, but of course, not everyone will be happy regardless of what SE decided to do with SMN in the future (especially since SMN has been presented in a number of different ways over the course of the franchise).